TO DO PAEDS PART 2 Flashcards
FEBRILE CHILD
In terms of the NICE traffic light system, what is considered amber for…
i) colour?
ii) activity?
iii) respiratory?
iv) circulation and hydration?
v) other?
i) Pallor
ii) No smile, decreased activity, not responding to social cues, wakes when roused
iii) Nasal flaring, SpO2 ≤95%, crackles in chest RR>50 (6-12m) or >40 (>12m)
iv) Tachy (>160 if <1y, >150 if 1–2y, >140 if 2–5y), CRT ≥3s, dry mucous membranes, reduced urine output
v) 3-6m temp ≥39, fever ≥5d, rigors, joint swelling, non-weight bearing
FEBRILE CHILD
In terms of the NICE traffic light system, what is considered red for…
i) colour?
ii) activity?
iii) respiratory?
iv) circulation and hydration?
v) other?
i) Mottled skin
ii) No response to cues, doesn’t wake if roused, weak, high-pitched or constant cry
iii) Grunting, RR>60, mod-severe chest indrawing
iv) Reduced skin turgor, no urine output
v) <3m temp ≥38, non-blanching rash, bulging fontanelle, neck stiffness, status, focal seizures/neuro
CHICKEN POX
What are some risk factors for chicken pox?
- Immunocompromised
- Older age
- Steroids
- Malignancy
- Neonates
MENINGITIS
What are the most common causes of bacterial meningitis?
- Neonates = GBS or listeria monocytogenes
- 1m–6y = N. meningitidis (gram -ve diplococci), S. pneumoniae (gram + ve cocci chain), H. influenzae
- > 6y = meningococcus + pneumococcus, rarely TB
MENINGITIS
What is the difference between Kernig’s and Brudzinski signs?
- Kernig = pain/unable to extend leg at knee when it’s bent
- Brudzinski = involuntary flexion of hips/knees when neck flexed
MENINGITIS
You suspect a diagnosis of bacterial meningitis. How would a lumbar puncture confirm the diagnosis for…
i) appearance?
ii) protein?
iii) glucose?
iv) white cell count?
v) other?
i) Cloudy/turbid
ii) ++ (make protein)
iii) –– (eat glucose)
iv) ++ neutrophil polymorphs
v) Gram stain
MENINGITIS
You suspect a diagnosis of viral meningitis. How would a lumbar puncture confirm the diagnosis for…
i) appearance?
ii) protein?
iii) glucose?
iv) white cell count?
v) other?
i) Clear
ii) Normal/+
iii) Normal/-
iv) + lymphocytes
v) PCR
MENINGITIS
You suspect a diagnosis of TB meningitis. How would a lumbar puncture confirm the diagnosis for…
i) appearance?
ii) protein?
iii) glucose?
iv) white cell count?
v) other?
i) Turbid/viscous
ii) +++
iii) –––
iv) + lymphocytes
v) Acid fast bacilli
MENINGITIS
What are some complications of meningitis?
- Hearing (sensorineural) loss is key complication
- Seizures + epilepsy, cerebral abscess, encephalitis + hydrocephalus
- Cognitive impairment, cerebral palsy + LD
MENINGITIS
What is the management of bacterial meningitis?
- Supportive = correct shock with fluids, oxygen if needed
- <3m = IV cefotaxime + amoxicillin (cover listeria from ?pregnancy)
- > 3m = IV ceftriaxone + IV dexamethasone to reduce frequency + severity of hearing loss + neuro damage (NOT before 3m)
ENCEPHALITIS
What would the CSF analysis show in encephalitis for…
i) appearance?
ii) protein?
iii) glucose?
iv) white cell count?
i) Clear
ii) Normal/+
iii) Normal/–
iv) + lymphocytes
KAWASAKI DISEASE
What is the diagnostic criteria for Kawasaki disease?
Fever + 4 (MyHEART) –
- Mucosal involvement (red/dry cracked lips, strawberry tongue)
- Hands + feet (erythema then desquamation)
- Eyes (bilateral conjunctival injection, non-purulent)
- lymphAdenopathy (unilateral cervical >1.5cm)
- Rash (polymorphic involving extremities, trunk + perineal regions
- Temp >39 for >5d
KAWASAKI DISEASE
What is a key complication of Kawasaki disease?
- Coronary artery aneurysm + sudden death
KAWASAKI DISEASE
What is the management of Kawasaki disease?
1ST LINE
- IV immunoglobulin (IVIg)
- aspirin
- follow-up echocardiogram
2ND LINE
- corticosteroids
MEASLES
What is measles?
- Infection with measles virus (RNA paramyxovirus) via droplets (highly contagious)
MEASLES
What is the clinical presentation of measles?
- Prodromal Sx for 3–5d (CCCK) – Cough, Coryza, Conjunctivitis, Koplik spots
- Maculopapular rash starts on forehead, neck + behind ears > down to limb, trunk
- Fever, marked malaise
MEASLES
What are some important complications of measles?
- Otitis media (commonest complication)
- Pneumonia (commonest cause of death)
- Diarrhoea
- Febrile convulsions, encephalitis
- Subacute sclerosing panencephalitis rare where 5-10y after primary measles > loss of neuro function, dementia + death
RUBELLA
What is the clinical presentation of rubella?
SYMPTOMS
- rash
- arthralgia
- prodromal symptoms (low grade fever, headache, malaise, coryza)
SIGNS
- maculopapular rash (starts on face before spreading down neck + becoming generalised)
- lymphadenopathy (suboccipital, postauricular and cervical)
RUBELLA
What are some complications of rubella?
How can it be reduced?
- Rare but > encephalitis, arthritis, myocarditis + thrombocytopenia
- Congenital rubella syndrome > cataracts, CHD + sensorineural deafness
- Avoid pregnant women, school exclusion 4d from rash, ensure vaccinated
MUMPS
What is mumps?
How does it occur?
- RNA paramyxovirus, occurs in winter + spring, spreads via resp droplets where virus replicates in epithelial cells
- Virus accesses parotid glands before further dissemination
MUMPS
What are some complications of mumps?
- Viral meningitis + encephalitis
- Orchitis (usually unilateral, may reduce sperm count + lead to infertility)
- Pancreatitis
SCARLET FEVER
What is the clinical presentation of scarlet fever?
SYMPTOMS
- sore throat
- fever (>38.3 degrees)
- fatigue
- nausea and vomiting
- headache
SIGNS
- petechiae on hand and soft palate
- strawberry tongue (erythema, white exudate, enlarged papillae)
- rash (widespread, erythematous, blanching, pinpoint ‘sandpaper’ texture, accentuated in flexure creases, begins on trunk, spares palms and soles)
- cervical lymphadenopathy
- facial flushing
SCARLET FEVER
What is the management of scarlet fever?
- Notifiable disease
- Phenoxymethylpenicillin for 10d to prevent rheumatic fever
- Supportive (fluids, pain relief)
- School exclusion until 24h after Abx
SLAPPED CHEEK
What is slapped cheek syndrome, or erythema infectiosum?
- Caused by parvovirus B19, outbreaks common during spring months
SLAPPED CHEEK
What is the clinical presentation of slapped cheek syndrome?
- Prodromal Sx = fever, malaise, headache, myalgia
- Followed by classic rose-red rash on face week later (slapped-cheek)
- Progresses to maculopapular, ‘lace-like’ rash on trunk + limbs
SLAPPED CHEEK
What are some complications of slapped cheek syndrome?
- Aplastic crisis (most serious) more common in chronic haemolytic anaemias like sickle cell, thalassaemia + in immunocompromised
- Vertical transmission can lead to foetal hydrops + death due to severe anaemia
STAPH SCALDED SKIN
What is the clinical presentation of SSSS?
- Starts as generalised patches of erythema on the skin, skin looks thin + wrinkled
- Bullae formation which burst + leave very sore, erythematous skin below (like a burn/scald)
- Nikolsky sign = gentle rubbing causes peeling
- Systemic Sx = fever, lethargy, dehydration > sepsis
STAPH SCALDED SKIN
What is the management of SSSS?
- Most need admission for IV flucloxacillin, fluid balance + analgesia
VACCINATIONS
How should vaccinations be given in those who are premature?
- Not adjusted for prematurity, give chronologically
- Babies born <28w should receive first set in hospital due to risk of apnoea
VACCINATIONS
What vaccines are attenuated?
- MMR, BCG, nasal flu, rotavirus + Men B
VACCINATIONS
What vaccines are given at…
i) 2m?
ii) 3m?
iii) 4m?
i) 6-in-one, rotavirus + men B
ii) 6-in-one, rotavirus + PCV
iii) 6-in-one, men B
VACCINATIONS
What vaccines are given at…
i) 1y?
ii) 3y + 4m?
iii) 12-13y?
iv) 14y?
i) Men B, PCV, Hib/Men C + MMR
ii) MMR, 4-in-one preschool booster = DTaP + IPV
iii) HPV
iv) 3-in-1 teenage booster = tetanus, diphtheria + IPV, men ACWY
VACCINATIONS
When in the vaccination schedule would at risk individuals get…
i) hep B vaccine?
ii) BCG?
i) Neonate, 1m and 1y (as well as 2m, 3m, 4m as normal schedule)
ii) Neonate
ALLERGY
What is the Gell and Coombs hypersensitivity classification?
- Type 1 = IgE trigger mast cells + basophils to release histamines + cytokines
- Type 2 = IgG/M bind to cell-surface antigens which is a host cell but activates immune system as considers foreign > cytotoxic
- Type 3 = immune complex mediated with activation of complement/IgG
- Type 4 = T-cell mediated delayed type hypersensitivity
WHOOPING COUGH
What are some complications of pertussis?
- Pneumonia
- Convulsions
- Bronchiectasis
WHOOPING COUGH
What is the management of pertussis?
- Notify PHE
- Prophylaxis = vaccine (esp. infants + pregnant women) or if close contact macrolide (erythromycin)
- PO macrolides (azithromycin, clarithromycin) 1st line if onset <21d
- School exclusion for 48h following Abx or 21d from onset if no Abx
POLIO
what is the clinical presentation?
90-95% of cases are asymptomatic
fatigue
fever
nausea and vomiting
diarrhoea
sore throat
headache
photophobia
POLIO
what are the clinical features of a more serious polio infection?
acute flaccid paralysis (AFP)
- initially fatigue, fever N+V
- asymmetrical lower limb weakness and flaccidity
can progress to life-threatening bulbar paralysis and respiratory compromise
POLIO
what are the investigations?
- virus culture from stool, CSF or pharynx
- CSF analysis
- serum antibodies to poliovirus
- MRI of spinal cord
- EMG of affected limb(s)
POLIO
what are the complications?
post-poliomyelitis syndrome (PPS) - this usually occurs years after the initial infection
- demonstrates the same features as polio infection
- treated in the same way as polio
DIPHTHERIA
what is the cause?
Corynebacterium diphtheriae
DIPHTHERIA
what is the management?
- hospitalisation, isolation
- diphtheria anti-toxin
- IM penicillin
DIPHTHERIA
what is the management for close-contacts?
prophylactic antibiotics - erythromycin
diphtheria toxoid immunisation
CHICKEN POX
What is the management of Ramsay Hunt syndrome?
PO aciclovir + corticosteroids
KAWASAKI DISEASE
What are the side effects of IVIG in the management of Kawasaki disease?
- anaphylaxis,
- aseptic meningitis,
- organ dysfunction
MUMPS
What marker may be raised?
Raised amylase
SCARLET FEVER
What are some complications of scarlet fever?
- Otitis media (#1),
- quinsy,
- post-strep glomerulonephritis,
- rheumatic fever
ALLERGY
Give an example of a type 2 hypersensitivity reaction
- autoimmune disease,
- haemolytic disease of newborn,
- transfusion reaction
ALLERGY
Give an example of a type 3 hypersensitivity reaction
- SLE,
- RA,
- HSP,
- post-strep glomerulonephritis
ALLERGY
Give an example for of a type 4 hypersensitivity reaction
- TB,
- contact dermatitis
VACCINATIONS
Which vaccines are included in the 6-in-1 injection?
- diphtheria
- tetanus
- pertussis DTaP (whooping cough)
- polio IPV
- Haemophilus influenza B (HiB)
- Hepatitis B
PERTHE’S DISEASE
What are some risk factors for Perthe’s disease?
- Social deprivation
- LBW
- Passive smoking
JIA
What is the criteria for a clinical diagnosis of JIA?
- Onset before 16y with no underlying cause
- Joint swelling/stiffness
- > 6w in duration to exclude other causes (i.e. reactive)
JIA
What are the 4 types of JIA?
- Systemic JIA (Still’s disease)
- Polyarticular JIA
- Oligoarticular JIA
- Enthesitis-related arthritis
JIA
How does systemic JIA (Still’s disease) present?
- Subtle salmon-pink rash
- High swinging fevers
- Lymphadenopathy, weight loss, muscle pain, splenomegaly
- Pleuritis, pericarditis + uveitis
JIA
What is the main complication of systemic JIA?
- Macrophage activation syndrome = severe activation of immune system with massive inflammatory response
JIA
What are the XR features of JIA?
Same as RA (LESS) –
- Loss of joint space
- Erosions (causing joint deformity)
- Soft tissue swelling
- Soft bones (osteopenia)
JIA
What are some complications from JIA?
- Chronic anterior uveitis > severe visual impairment
- Flexion contractures of joints
- Growth failure + constitutional problems like delayed puberty
- Osteoporosis
JIA
What is the medical management of JIA?
1st line
- intra-articular corticosteroids
- IV corticosteroids (for short term control of severe symptoms)
- methotrexate
- NSAIDs (to reduce pain + inflammation)
- physiotherapy + occupational therapy
2nd line
- etanercept
- anakinra
- tocilizumab
SUFE/SCFE
What is SUFE/SCFE associated with?
- Boys, >10y, obese + undergoing growth spurt
- Metabolic endocrine abnormalities (hypothyroid)
SUFE/SCFE
What is the clinical presentation of SUFE/SCFE?
SYMPTOMS
- unilateral pain in groin, hip, thigh and/or knee
- limp (acute or chronic)
- bilateral pains in the groin, hip, thigh or knee
SIGNS
- restricted flexion, abduction and internal rotation of hip joint
- antalgic gait
OSTEOGENESIS IMPERFECTA
What is osteogenesis imperfecta?
- Autosomal dominant condition leading to brittle bones + prone to fractures
OSTEOGENESIS IMPERFECTA
What are some associations with osteogenesis imperfecta?
- Conductive hearing loss (otosclerosis)
- Blue/grey tinted sclera due to scleral thinness
- Valvular prolapse, aortic dissection > aortic incompetence
- Hernias
- ‘Wormian bones’ = skull feels like bubble wrap (wiggly black lines on skull XR)
OSTEOGENESIS IMPERFECTA
In the Sillence classification, what is…
i) type 1?
ii) type 2?
iii) types 3–4?
i) Mildest form, common with blue sclera
ii) Lethal form, chest too small to allow breathing, lots of rib # + lungs do not function
iii) Normal sclera
OSTEOGENESIS IMPERFECTA
What is the medical management of osteogenesis imperfecta?
- Vitamin D supplementation to prevent deficiency
- Bisphosphonates (IV pamidronate) to increase bone density + reduce #
RICKETS
What are some risk factors for rickets?
- Darker skin (need more sunlight)
- Lack of exposure to sun
- Poor diet or malabsorption
- exclusive breastfeeding without vitamin D supplementation
- CKD as kidneys metabolise vitamin D to active form
RICKETS
What is the normal physiology of vitamin D?
- Increases Ca2+ absorption at gut + reabsorption at kidneys + role in immunity
RICKETS
What are the symptoms of rickets?
SYMPTOMS
- pain in bones or joints
- muscle weakness
- drowsiness
- delayed walking
- frequent pathological fractures
SIGNS
- bowing of legs
- rachitic rosary (row of bead-like prominences at junction of rib + cartilage)
- reduced muscle tone
- widened wrist joints
- harrison’s groove (indentation on the chest roughly along 6th rib)
RICKETS
What are some bone deformities seen in rickets?
- Bowing of legs, knock knees
- Harrison sulcus = indentation of softened lower ribcage at site of attachment of diaphragm
- Rachitic rosary = ends of ribs expand at costochondral junctions causing lumps along chest
- Craniotabes = soft skull with delayed closure of sutures + frontal bossing
- Expansion of metaphyses (esp. wrist)
RICKETS
What would serum biochemistry show in rickets?
- Low = calcium + phosphate
- High = ALP + PTH
- 25-hydroxyvitamin D levels deficient (<25nmol/L)
RICKETS
What might an XR show in rickets?
- Osteopenia (radiolucent bones)
- Cupping
- Fraying of metaphyses
- Widened epiphyseal plate
RICKETS
What is the management of rickets?
Prevention
- Breastfeeding women should take vitamin D supplement
1st line management
- vitamin D supplementation (1000-2000U daily)
- calcium supplementation
- phosphate supplementation
2nd line
- UVB light exposure
- orthopaedic intervention
COMMON BIRTHMARKS
What is a salmon patch?
- ‘Stork mark’
- Most common vascular birthmark
- Flat red or pink patches on baby’s eyelids, neck or forehead at birth
- Fade completely in few months
COMMON BIRTHMARKS
What is a cavernous haemangioma?
- ‘Strawberry mark’
- Raised marks on skin often red, F>M
- Not present at birth, appear in first month, increase in size then shrink + disappear
- Normally self-limiting, beware over eye + airway
COMMON BIRTHMARKS
What is a capillary haemangioma?
- ‘Port wine stain’ = permanent, often unilateral
- Present at birth + grows with infant, treated with laser therapy
- Seen in Sturge-Weber syndrome (neuro Sx)
NAPPY RASH
How do you differentiate between irritant dermatitis and candida dermatitis?
- Irritant = sore, red, inflamed skin but spares the skin creases
- Candida = involves skin creases, satellite lesions (small similar lesions near edges of principle lesion) + may have oral thrush
NAPPY RASH
What are some risk factors for developing nappy rash?
- Delayed changing of nappies
- Diarrhoea
- Irritant soap products + vigorous cleaning
- PO Abx predispose to Candida
NAPPY RASH
What is the management of nappy rash?
- Highly absorbent nappies
- Maximise time not wearing + ensure dry before replacing nappy
- Change nappy + clean skin ASAP
- Water or gentle alcohol-free products to clean
- Topical imidazole if candida
STEVEN-JOHNSON
What are some potential causes of Steven-Johnson syndrome?
- Meds = AEDs, Abx, allopurinol, NSAIDs
- Infections = herpes simplex, mycoplasma pneumonia, CMV, HIV
STEVEN-JOHNSON
What is the management of Steven-Johnson syndrome?
1ST LINE
- withdrawal of causative agent
- hospital admission
- supportive care (IV fluids, temp regulation, wound care + nutritional support)
- analgesia
- eye care
- mouth care
- IV immunoglobin
2ND LINE
- immunosupressants (ciclosporin or cyclophosphamide)
- systemic corticosteroids
- plasmapheresis
SCOLIOSIS
what conditions can cause scoliosis?
cerebral palsy
muscular dystrophy
birth defects
infections
tumours
marfan syndrome
down syndrome
TORTICOLLIS
what are the causes of congenital torticollis?
- congenital muscular torticollis (CMT) = usually noticed in 1st month after birth. It causes shortening + fibrosis of sternocleidomastoid (can have palpable mass)
- malformed cervical spine
- spina bifida
TORTICOLLIS
what is the management?
treat the cause
- muscle spasm = self resolve
- infection = antibiotics
- Congenital = physiotherapy
OSGOOD SCHLATTERS
what is the cause?
repeated traction over the tibial tubercle which results in microvascular tears, fractures and inflammation
OSGOOD SCHLATTERS
what are the risk factors?
- male gender
- age - 12-15 in boys, 8-12 in girls
- sudden skeletal growth
- repetitive activities such as jumping and sprinting
SEPTIC ARTHRITIS
What are common causes in…
i) infants?
ii) <4y?
iii) >4y?
i) GBS, S. aureus, coliforms
ii) S. aureus, pneumococcus, haemophilus
iii) S. aureus, gonococcus (adolescents)
SEPTIC ARTHRITIS
what is the criteria for diagnosing septic arthritis?
Kocher’s modified criteria /5, ≥3 is likely
–Temp>38.5
– Raised CRP/ESR/WCC
– Non-weight bearing
OSTEOMYELITIS
What are some risk factors?
- Open #,
- orthopaedic surgery,
- sickle cell anaemia (Salmonella predominates),
- immunocompromised (HIV),
OSTEOGENESIS IMPERFECTA
What is the pathophysiology?
Defects in type 1 collagen protein which is essential for the structure + function of bone, as well as skin, tendons + other connective tissues
RICKETS
What are some sources of vitamin D?
Sunlight, fortified cereals, eggs, oily fish
COMMON BIRTHMARKS
What is a slate grey naevi?
What are the differentials for slate grey naevi?
- Mole, can be multiple present in Turner’s
- ‘Mongolian blue spot’, disappear by 4, commonly lower back/buttocks, more common in non-Caucasian
- Bruising + NAI so important to document
JIA
How does macrophage activation syndrome present?
- Acutely unwell with DIC,
- febrile,
- anaemia,
- thrombocytopenia,
- bleeding,
- non-blanching rash,
- low ESR
JIA
What is the management of macrophage activation syndrome?
Life-threatening = supportive + steroids
STEVEN-JOHNSON
what are the investigations?
- skin biopsy = full thickness epidermal keratinocyte necrosis + minimal dermal inflammation
- serum granulysin = elevated
to consider
- FBC, CRP and blood cultures (to exclude staph scalded skin syndrome)
- U&Es (look for dehydration + AKI)
RICKETS
what are the causes?
vitamin D deficiency
- nutritional rickets (inadequate intake)
- hypophosphataemic rickets (due to renal phosphate wasting)
- calcipaenic rickets = abnormal vitamin D metabolism or resistance
PERTHE’S DISEASE
what is the classifications system?
Catterall classification
defines severity based on epiphyseal involvement on AP and lateral x-rays
NEUROBLASTOMA
What are the investigations for neuroblastoma?
- Raised urinary catecholamine levels
- CT/MRI + confirmatory biopsy
- Evidence of metastatic disease = bone marrow sampling, MIBG scan ±bone scan
RETINOBLASTOMA
What is a genetic cause of retinoblastoma?
How might it present?
- Retinoblastoma susceptibility gene on chromosome 13 = AD but incomplete penetrance > offer genetic screening
- All bilateral tumours are hereditary, 20% of unilateral are
RETINOBLASTOMA
What are some complications of retinoblastoma?
- Significant risk of second malignancy (especially sarcoma) amongst survivors of hereditary retinoblastoma
FANCONI SYNDROME
What is fanconi syndrome?
- Generalised reabsorptive disorder of renal tubular transport in the PCT resulting in…
– Type 2 (proximal) renal tubular acidosis
– Polydipsia, polyuria, aminoaciduria + glycosuria
– Osteomalacia/rickets
FANCONI SYNDROME
What are some causes of fanconi syndrome?
- Usually secondary to inborn errors of metabolism
– Cystinosis (AR > intracellular accumulation of cysteine, most common)
– Wilson’s disease, galactosaemia, glycogen storage disorders
ANAEMIA OVERVIEW
What is anaemia?
How is it defined in paeds?
- Hb level below the normal range
- Neonate = <14g/dL
- 1–12m = <10g/dL
- 1–12y = <11g/dL
ANAEMIA OVERVIEW
What are some causes of decreased red cell production?
What are some clues?
- Ineffective erythropoiesis (Fe, folate deficiency, CKD)
- Red cell aplasia
- Normal reticulocytes, abnormal MCV in nutrient deficiencies
ANAEMIA OVERVIEW
What are some causes of haemolysis?
What are some clues?
- G6PD deficiency, haemoglobinopathies, hereditary spherocytosis
- Raised reticulocytes, abnormal appearance on blood films, +ve direct antiglobulin test if immune cause
ANAEMIA OVERVIEW
List 4 features of haemolytic anaemias
- Anaemia
- Hepatosplenomegaly
- Unconjugated bilirubinaemia
- Excess urinary urobilinogen
ANAEMIA OVERVIEW
What are some causes of anaemia in the neonate?
- Reduced RBC production = congenital red cell aplasia + congenital parvovirus infection > red cell aplasia
- Haemolytic anaemia = immune (haemolytic disease of newborn) or hereditary (G6PD etc)
ANAEMIA OVERVIEW
What are the main causes of anaemia of prematurity?
- Inadequate erythropoietin production
- Reduced red cell lifespan
- Frequent blood sampling whilst in hospital
- Iron + folic acid deficiency after 2-3m.
IRON DEF ANAEMIA
What are some sources of iron?
What can affect iron absorption?
- Breast milk, formula, cow’s milk or weaning (cereals)
- Markedly increased when eaten with food rich in vitamin C + inhibited by tannin in tea
IRON DEF ANAEMIA
What are the symptoms of iron deficiency anaemia?
- Generic = fatigue, SOB, headaches, dizziness, palpitations
- Young infants feed more slowly + children tire easily
VON WILLEBRAND DISEASE
What is von Willebrand disease (vWD)?
What causes it?
Types?
- Deficiency of vWF leading to defective platelet plug formation + deficient FVIII:C > most common inherited bleeding disorder
- AD, type 1 most common + mildest
- Severity increases with type 2, type 3 has very low or no vWF (AR)
VON WILLEBRAND DISEASE
What are some investigations for vWD?
- FBC (normal platelets) + blood film, biochemical screen including renal + liver function
- Prolonged bleeding time
- Prothrombin time normal
- APTT = elevated or normal
- vWF antigen decreased, vWF multimers variable
VON WILLEBRAND DISEASE
What is the management of vWD?
- Pressure applied if active bleeding
- Minimise bleeding with desmopressin or TXA
- Severe = plasma derived FVIII concentrate or vWF infusion
- AVOID aspirin, NSAIDs + IM injections as can worsen bleeding
COAGULATION DISORDERS
What are acquired disorders of coagulation?
Secondary to
- Haemorrhagic disease of the newborn due to vitamin K deficiency
- Liver disease as location of clotting factor production
- ITP + DIC
COAGULATION DISORDERS
What can cause vitamin K deficiency?
- Inadequate intake = neonates, long-term chronic illness
- Malabsorption = coeliac, cystic fibrosis
- Vitamin K antagonists = warfarin
HAEMOLYTIC DISEASE OF THE NEWBORN
what is the clinical presentation?
- anti-D antibodies in mother detected by Coombe’s test that all women have at 1st antenatal appointment
- routine USS may detect hydrops fetalis or polyhydramnios
- mild cases = jaundice, pallor + hepatosplenomegaly, hypoglycaemia
- severe cases = oedema, petechiae + ascites
HAEMOLYTIC DISEASE OF THE NEWBORN
what are the investigations?
- indirect coombe’s test show antibodies
- antenatal USS shows hydrops fetalis
- fetal blood sample
HAEMOLYTIC DISEASE OF THE NEWBORN
what is the management in utero?
- transfusion of O negative packed cells cross-matched with maternal blood at 16-18 weeks
HAEMOLYTIC DISEASE OF THE NEWBORN
what is the management after delivery?
50% = normal haemoglobin + bilirubin but should be monitored for anaemia for 6-8 weeks
25% = require transfusion + may require phototherapy to avoid kernicterus
25% = stillborn or have hydrops fetalis
GENETICS OVERVIEW
What is genomic imprinting + uniparental disomy?
Give an example
- Most genes both copies are expressed, some genes are only maternally or paternally expressed (imprinting)
- Prader-Willi + Angelman’s syndrome both caused by either cytogenic deletions of the same region of chromosome 15q or by uniparental disomy of chromosome 15
GENETICS OVERVIEW
Explain the process of gonadal mosaicism
- Father = mosaic sperm (some sperm with mutated gene, some sperm normal)
- Mother = all eggs with normal gene
- Offspring = fertilised egg > union of male DNA (sperm) with mutated gene + female DNA (egg) with normal gene
- Every cell of embryo has one copy of mutated + one copy of normal
DOWN’S SYNDROME
What is the classical craniofacial appearance in Down’s syndrome?
- Flat occiput (brachycephaly) + flat bridge of nose
- Upward sloping palpebral fissures (eyes slant down + inwards)
- Prominent epicanthic folds (skin overlying medial portion of eye + eyelid)
- Short neck + stature
- Small mouth, protruding tongue, small ears
- Brushfield spots in iris (pigmented spots)
DOWN’S SYNDROME
Other than craniofacial anomalies, what other anomalies can be seen in Down’s syndrome?
- Widely separated first + second toe (sandal gap)
- Hypotonia
- Single transverse palmar (simian) crease
DOWN’S SYNDROME
What are some complications of Down’s syndrome?
- LDs + delayed motor milestones
- Complete AVSD
- Atlantoaxial instability = risk of neck dislocation during sports
- Hypothyroidism, duodenal atresia, Hirschsprung’s
- Hearing + visual impairment, strabismus
- Increased ALL + early-onset dementia
PATAU’S SYNDROME
What is Patau’s syndrome?
- Severe physical + mental congenital abnormalities due to trisomy 13
PATAU’S SYNDROME
What are some clinical features of Patau’s syndrome?
- Microcephalic, scalp lesions, small eyes + other eye defects
- Cleft lip + palate
- Polydactyly (think 13 fingers)
- Cardiac + renal malformations
EDWARD’S SYNDROME
What is Edward’s syndrome?
- Trisomy 18, mostly F
- Severe psychomotor + growth retardation if survive 1st year of life
EDWARD’S SYNDROME
What is the clinical presentation of Edward’s syndrome?
- Prominent occiput
- Small mouth + chin (micrognathia)
- Low set ears
- Flexed, overlapping fingers
- Rocker-bottom feet (flat)
- Cardiac + renal malformations
FRAGILE X SYNDROME
What are some cognitive features of fragile X syndrome?
- Intellectual disability
- Delay speech + language
- Delayed motor development (may be secondary to hypotonia)
- Aggressive, hyperactive + poor impulse control
- “Cocktail personality” = happy bouncy children
FRAGILE X SYNDROME
What are some physical features of fragile X syndrome?
- Long narrow face + large ears
- Large testicles after puberty
- Hypermobile joints (esp. hands)
- Hypersensitivity to stimuli
TURNER’S SYNDROME
What is the clinical presentation of Turner’s syndrome?
- Short stature, webbed neck, shield chest + widely spaced nipples (classic)
- Delayed puberty, underdeveloped ovaries > primary amenorrhoea + infertility
- Cubitus valgus
TURNER’S SYNDROME
What are some complications of Turner’s syndrome?
- Coarctation or bicuspid aortic valve
- Increased risk of CHD > HTN, obesity
- DM, osteoporosis, hypothyroidism
- Recurrent otitis media + UTIs
- Horseshoe kidney, susceptible to x-linked recessive conditions
TURNER’S SYNDROME
What is the management of Turner’s syndrome?
- GH therapy to prevent short stature
- Oestrogen + progesterone replacement to establish 2ary sex characteristics, regulate menstrual cycle + prevent osteoporosis
- Fertility treatment like IVF
DUCHENNE’S
What is Duchenne’s muscular dystrophy?
- X-linked recessive chromosome 21 = gene deletion for dystrophin (connects muscle fibres to ECM)
DUCHENNE’S
What is the clinical presentation of Duchenne’s muscular dystrophy?
- Proximal muscle weakness from 5y
- Delayed milestones
- Waddling gait
- Gower sign +ve
- Calf pseudohypertrophy (replaced by fat + fibrous tissue)
KLINEFELTER SYNDROME
What is Klinefelter syndrome?
- When a male has an additional X chromosome, making 47XXY
- Rarely even more X chromosomes like 48XXXY (more severe)
- Chief genetic cause of hypergonadotropic hypogonadism
KLINEFELTER SYNDROME
What is the clinical presentation of Klinefelter syndrome?
- Often appear normal until puberty
- Taller height + wider hips
- Delayed puberty (lack of pubic hair, poor beard growth)
- Gynaecomastia, small testicles/penis, infertility
- Weaker muscles, shyness, subtle learning difficulties (esp. speech + language)
KLINEFELTER SYNDROME
What are some complications of Klinefelter syndrome?
- Increased risk of breast cancer compared to other males
- Osteoporosis
- Diabetes
- Anxiety + depression
KLINEFELTER SYNDROME
What is the medical management of Klinefelter syndrome?
- Monthly testosterone injections to promote sexual characteristics
- Advanced IVF techniques for infertility
- Breast reduction surgery for cosmesis
PRADER-WILLI SYNDROME
What is the clinical presentation of Prader-Willi syndrome?
- Constant, insatiable hunger > hyperphagia + obesity
- Initially failure to thrive due to hypotonia
- Small genitalia, hypogonadism + infertility
- Narrow forehead, almond eyes, strabismus
- LDs, MH issues
PRADER-WILLI SYNDROME
What is the management of Prader-Willi syndrome?
- GH to improve muscle development + body composition
- MDT = education support, social workers, psychologists/CAMHS, physio + OT
ANGELMAN’S SYNDROME
What is Angelman’s syndrome?
What is it caused by?
- Genetic imprinting disorder due to deletion of maternal chromosome 15 or paternal uniparental disomy
- Loss of function of maternal UBE3A gene
ANGELMAN’S SYNDROME
What is the clinical presentation of Angelman’s syndrome?
- “Happy puppet” = unprovoked laughing, clapping, hand flapping, ADHD
- Fascination with water
- Epilepsy, ataxia, broad based gait
- Severe LD, delayed development
- Widely spaced teeth, microcephaly
NOONAN’S SYNDROME
What is Noonan’s syndrome?
- Autosomal dominant condition with defect on chromosome 12, normal karyotype
NOONAN’S SYNDROME
What is the clinical presentation of Noonan’s syndrome?
- Short stature, webbed neck, widely spaced nipples (Male Turner’s)
- Pectus excavatum, low set ears
- Hypertelorism (wide space between eyes)
- Downward sloping eyes with ptosis
- Curly/woolly hair
NOONAN’S SYNDROME
What are some complications of Noonan’s syndrome?
- CHD = pulmonary valve stenosis
- Cryptorchidism which can lead to infertility (fertility in women normal)
- LDs, bleeding disorders (XI deficient)
WILLIAM’S SYNDROME
What is William’s syndrome?
- Random deletion of genetic material on one copy of chromosome 7 resulting in only single copy of genes from other chromosome 7
WILLIAM’S SYNDROME
What is the clinical presentation of William’s syndrome?
- Very friendly + sociable
- Starburst eyes (star-pattern on iris)
- Wide mouth, big smile + widely spaced teeth
- Broad forehead, short nose + small chin
- Mild LD, short stature
WILLIAM’S SYNDROME
What are some complications of William’s syndrome?
- Supravalvular aortic stenosis
- ADHD
- HTN + hypercalcaemia
GENETICS OVERVIEW
What is non-disjunction?
What is the outcome?
Management?
Karyotype?
- Error in meiosis where pair of chromosomes fail to separate so one gamete has 2 chromosome copies and one has none
- Fertilisation of the gamete with 2 chromosomes gives rise to a trisomy
- Parental chromosomes do not need to be examined, related to maternal age
- 47 chromosomes
GENETICS OVERVIEW
What is Robertsonian translocation?
Karyotype?
- Extra copy of one chromosome is joined onto another chromosome
- 46 chromosomes but 3 copies of one chromosomes material
PRADER-WILLI SYNDROME
What is Prader-Willi syndrome?
- Genetic imprinting disorder due to deletion of paternal chromosome 15 or maternal uniparental disomy
PUBERTY
Explain the tanner stages for…
i) breast?
ii) pubic hair?
iii) genitalia?
i) BI = pre-pubertal, BII = breast bud, BIII = juvenile smooth contour, BIV = areola + papilla project above breast, BV = adult
ii) PHI = none, PHII = sparse, PHIII = dark, coarser, curlier, PHIV = filling out, PHV = adult
iii) GI = pre-adolescent, GII = lengthens, GIII = growth in length + circumference, GIV = glans penis develops, GV = adult
PRECOCIOUS PUBERTY
What is the pathophysiology and potential causes of central precocious puberty?
Pathophysiology: LH++, FSH+ > oestrogen from ovary ++ or testosterone from testis ++ & adrenal +
Causes:
- Familial,
- hypothyroidism,
- CNS (neurofibroma, tuberous sclerosis)
PRECOCIOUS PUBERTY
What is the management of precocious puberty in females?
- Full Hx, ages parents went into puberty, USS of uterus + ovaries
- If ok = reassure
- GnRH analogues stop puberty progressing further by suppressing pulsatile GnRH secretion until she is ready
PRECOCIOUS PUBERTY
What causes premature pubarche (adrenarche)?
How can you tell?
- Accentuation of normal maturation of androgen production by adrenal gland (adrenarche), can be late-onset CAH or adrenal tumour
- Urinary steroid profile to help differentiate
CAH
What is congenital adrenal hyperplasia (CAH)?
- Autosomal recessive condition with deficiency of 21-hydroxylase enzyme
- Small minority = 11-beta-hydroxylase
CAH
What is the pathophysiology of CAH?
- 21-hydroxylase responsible for converting progesterone into cortisol + aldosterone
- Progesterone also used to create testosterone, but not with 21-hydroxylase
- Excess progesterone (as not converted to aldosterone or cortisol) gets converted into testosterone instead (high)
CAH
What is the clinical presentation of CAH in females?
MILD
- ambiguous genitalia
- abnormal/absent periods
- deeper voice, early puberty + facial hair
- taller for age during childhood but become short as an adult if untreated
- skin hyperpigmentation
SEVERE
- virilised (male-appearing) genitalia from birth
- may exhibit features of mineralocorticoid and glucocorticoid deficiency from birth (hyponatraemia, hypoglycaemia + dehydration)
CAH
What are some investigations for CAH?
- serum 17-hydroxyprogesterone levels
- serum electrolytes = hyponatraemia, hyperkalaemia, acidosis
- serum hormone levels = raised ACTH and renin, low cortisol + aldosterone
to consider
- genetic testing
- pelvic USS (to visualise internal genitalia if ambiguous)
CAH
What is the general management of CAH?
- Lifelong glucocorticoids (HYDROCORTISONE) to suppress ACTH > normal growth
- Lifelong mineralocorticoids (FLUDROCORTISONE) if there’s salt loss,
- infants may need NaCl replacement
- Additional hydrocortisone to cover illness/surgery
- Antenatal dexamethasone controversial treatment, risks>benefits currently
SEXUAL DIFFERENTIATION
How does a male foetus produce male sexual characteristics?
- Leydig cells produce testosterone causing Wolffian duct differentiation > vas, epididymis, seminal vesicles
- Later, dihydrotestosterone leads to virilised external genitalia
SEXUAL DIFFERENTIATION
What is the process of female sexual differentiation?
- No SRY gene present so no AMH
- Mullerian duct persists which develops into ovaries + female genitalia
DELAYED PUBERTY
What are some causes of hypogonadotropic hypogonadism?
- Constitutional delay in growth + puberty (FHx)
- Chronic diseases (IBD, CF, coeliac)
- Excess stress (anorexia, intense exercise, low weight)
- Hypothalamo-pituitary disorders (panhypopituitarism, Kallman’s + anosmia, GH deficiency)
DELAYED PUBERTY
What are some causes of hypergonadotropic hypogonadism?
- Chromosomal abnormalities (Turner’s XO, Klinefelter’s 47XXY)
- Acquired gonadal damage (post-surgery, chemo/radio, torsion)
- Congenital absence of the testes or ovaries
DELAYED PUBERTY
In delayed puberty, what are some causes of…
i) short stature (delayed + short)?
ii) normal stature (delayed + normal)?
i) Turner’s, Prader-Willi + Noonan’s
ii) PCOS, androgen insensitivity, Kallmann’s + Klinefelter’s
DELAYED PUBERTY
What are some investigations for delayed puberty?
- FBC + ferritin (anaemia), U+E (CKD), coeliac antibodies
- Hormonal testing
- Genetic testing/karyotyping
- XR wrist to assess bone age (low in constitutional delay)
- Pelvic USS to assess ovaries + other pelvic organs
- MRI head if ?pituitary pathology + assess olfactory bulbs (Kallmann)
DELAYED PUBERTY
What is the management of delayed puberty?
- Constitutional = reassure, can Tx if severe distress
- F = oestradiol
- Young M = PO oxandrolone (weak androgenic steroid will induce some catch-up growth but not 2ary sexual characteristics)
- Older M = low dose IM testosterone for growth + sexual characteristics
CRYPTORCHIDISM
What is the first line management of cryptorchidism?
- If unilateral monitor as most newborns descend
- Wait 3m then refer to paeds urologist so they’re seen by 6m
- If bilateral needs urgent senior review within 24h
KALLMAN SYNDROME
what is it?
genetic disorder that can be inherited via autosomal dominant, autosomal recessive and x-linked
KALLMAN SYNDROME
what are the clinical features?
- hypogonadotropic hypogonadism
- anosmia
- synkinesia (mirror-image movements)
- renal agenesis
- visual problems
- craniofacial anomalies
KALLMAN SYNDROME
why do you get anosmia in this condition?
due to a defect in the co-migration of GnRH releasing neurons and olfactory neurons that occurs during early foetal development
ANDROGEN INSENSITIVITY SYNDROME
what is it?
a genetic condition in which there are defects in the androgen receptor
- is x-linked recessive
- patients are genetically male (46XY)but develop female phenotype
ANDROGEN INSENSITIVITY SYNDROME
what is complete AIS?
- karyotype = 46XY
- results in a completely female phenotype
- external genitalia are female (clitoris, hypoplastic labia majora + blind-ending vagina)
- testes may be present in abdomen
- absence of pubic + axillary hair
- normal breast development
ANDROGEN INSENSITIVITY SYNDROME
what is partial AIS?
- presents with a wide range of phenotypes
- can present as normal male with fertility issues
- sex assignment depends on the degree of genital ambiguity
ANDROGEN INSENSITIVITY SYNDROME
what is true hermaphroditism?
- have both ovarian tissue with follicles and testicular tissue with seminiferous tubules, either in the same organ or one on either side
- external genitalia are often ambiguous
ANDROGEN INSENSITIVITY SYNDROME
what is the inheritance pattern?
x-linked recessive
ANDROGEN INSENSITIVITY SYNDROME
what are the results of hormone tests?
- raised LH
- normal/raised FSH
- normal/raised testosterone
- raised oestrogen
FRAGILE X SYNDROME
What causes it?
Trinucleotide expansion repeat of CGG caused by slipped mispairing = ≤44 normal, 60–200 = premutation carriers, >200 = fragile X
PRECOCIOUS PUBERTY
What are the causes in females?
More common in girls, usually idiopathic or familial, occasionally late presenting CAH
PRECOCIOUS PUBERTY
What are the causes in males?
Less common, more worrying
– Pituitary adenoma (bilateral testicular enlargement suggests gonadotropin release)
– CAH or adrenal tumour (small testes)
– Gonadal tumour (unilateral testicular enlargement)
PRECOCIOUS PUBERTY
What is a genetic cause of precocious puberty?
McCune Albright syndrome (café-au-lait, short stature)
HYPOGONADISM
Name the 3 types of hypogonadism?
Primary = hypergonadotropic hypogonadism
Secondary = hypogonadotropic hypogonadism
Tertiary = hypogonadotropic hypogonadism
GONADOTROPIN DEFICIENCY
What is Hypergonadotropic hypogonadism?
Primary gonadal failure - Testes or ovarian failure
GONADOTROPIN DEFICIENCY
Give 2 causes of primary hypogonadism
Hypergonadotropic hypogonadism
Klinefelter’s Syndrome (47XXY)
Tuner’s Syndrome (45X)
GONADOTROPIN DEFICIENCY
What is the effect of Hypergonadotropic hypogonadism on FSH/LH and oestrogen/testosterone levels?
FSH/LH = high
Oestrogen/testosterone = low
GONADOTROPIN DEFICIENCY
What is Hypogonadotropic hypogonadism?
Secondary gonadal failure = problem with pituitary
OR
Tertiary gonadal failure = Problem with hypothalamus
GONADOTROPIN DEFICIENCY
Briefly describe the mechanism of secondary hypogonadism
Less FSH and LH
So less activation at gonads
Girls = no response to feedback so oestrogen decreases
Boys = no response to feedback so testosterone decreases
GONADOTROPIN DEFICIENCY
Briefly describe the mechanism of tertiary hypogonadism
Less GnRH produced
So less FSH and LH
So less activation at gonads
Girls = no response to feedback so oestrogen decreases
Boys = no response to feedback so testosterone decreases
GONADOTROPIN DEFICIENCY
Give 2 causes of Hypogonadotropic hypogonadism
- Kallmann’s Syndrome
- Tumours - craniopharyngiomas, germinomas
GONADOTROPIN DEFICIENCY
What is the effect of hypogonadotropic hypogonadism on FSH/LH and oestrogen/testosterone levels?
FSH/LH = low
Oestrogen/testosterone = low
HYPOTHALAMIC TUMOURS
what are the risk factors for developing hypothalamic tumours?
neurofibromatosis
undergone radiation therapy
PRECOCIOUS PUBERTY
What are the causes of pseudo precocious puberty?
Causes:
– Adrenal (tumours, CAH)
– Granulosa cell tumour (ovary)
– Leydig cell tumour (testicular)
CAH
What is the management of salt-losing crisis?
IV 0.9% NaCl + dextrose,
IV hydrocortisone
OBESITY
what are the causes of obesity in children other than lifestyle factors?
- growth hormone deficiency
- hypothyroidism
- Down’s syndrome
- Cushing’s syndrome
- Prader-Willi syndrome
CAH
what is the clinical presentation in males?
MILD
- may be asymptomatic
- enlarged penis
- small testicles
- early puberty
- deep voice
- taller for their age during childhood bit become short as adults if untreated
- skin hyperpigmentation
SEVERE
- exhibit mineralocorticoid and glucocorticoid deficiency soon after birth (hypoglycaemia, hyponatraemia, dehydration)
- large penis size