Paediatrics Flashcards
Describe risk factors for neonatal sepsis risk factors and its management
Premature neonates have fewer IgG transferred so cell mediated immunity less active, prolomged rupture of membranes, preterm labour, fetal distress
Group B Strep in mother raises risk
Maternal pyrexia eg secondary to chorioamnitis
Management: ABC, supportive (ventilation, inotropes)
Do septic screen - LP, urine, cultures, CRP, FBC, CXR
Broad spec abx before culture results - benzylpenicillin + genticmicin
Check lactate+
Mothers w/ PMH of GBS - give prophylactic IV abx (benzylpen) or if in preterm labour
Describe the pathology of meningitis
Inflammation of meninges following bacteraemia (mainly group B meningococcal group)
Neonates - GBS, E coli, Listeria monocytogenes
1 month - 6 yrs - Neisseria meningitides, S. pneumonia
Haemophilus influenzae
6+ - NM & SP
Presentation of meningitis?
Fever, headache, photophobia, lethargy, poor feeding, positive kernig’s sign, brudzinski sign (flexion of neck when child supine –> flexion of knees and hip), low GCS. septic: non blanching purpuric petichae
Ix for meningitis?
FBC, blood cultures, rapid antigen screen - EDTA blood sample PCR, LP (CI meningococcal septicaemia, focal neurological signs, raised ICP - papilloedema, significant bulging of fontanelle, DIC), CT
LP signs for bacterial vs viral meningitis?
Bacterial: cloudy, Polymorphs, high protein, low glucose
Viral: clear/cloudy, lymphocytes, normal glucose and protein
Complications of meningitis?
Acute: inflammation –> abscess, raised ICP, cerebral oedema. Arachnoid vili blocked by fibrin deposits –> blocks CSF –> hydrocephalus, sepsis
Chronic; epilepsy, developmental delay, hearing problems
Management of meningitis?
ABC
In GP: IM benzylpenicillin
Protect airway, high flowO2, IV fluids 0.9% NaCl saline - bolus if in shock
<3 months - IV cefotaxime (ceftriaxone/benpen also sensitive) + amoxacillin to cover Listeria
> 3months - IV cefotaxime
Dexamethsone to reduce complications if >1 month
Notify public Health England
Prophylaxis for people sharing room/kissing/spending more than 8 hours with etc
ciprofloxacin
3 year old child miserable, poor feeding, fever, vomiting, increased urinary frequency, dysuria, abdo pain - what is cause?
UTI - usually E. coli
More common in boys until 3 months (due to congenital abnormalitie) then more common in girls
Rx of UTI?
Urine sample if if any S/S of UTI or unexplained fever >38C
Sample and culture- clean catch sample (nappies/or urine collection pads), MSU (older)
Dipstick - Nitrates, leucocyte esterase
Culture - >10^5/ml - MC&S
Upper UTI: Admit if >3months to hospital - IV cefuroxime for 7 days - PO switch to trimethoprim
If not admitted - PO cephalosporin/coamoxiclav
Lower UTI: PO trimethoprim/nitrofurantoin for 3/7
USS scan - abnormal structure eg polycyctic kidneys, pelvic kidney, duplex ureters - predispose to UTI
Risk of recurrent UTI in childhood?
Renal failure in young adulthood
Child treated for UTI now has pyrexia, seizures. Why? Management?
Pathogen is extended spectrum beta-lactamase producer and so resistant to all penicillins.
MC&;S
Change to meropenem/gentamicin/ciprofloxacin
6 year old child presents with bone/joint pain, lethargy and fever. Dx?
Osteomyelitis
Investigation for ?osteomyelitis?
Blood culture and X-ray
What organism might a blood culture show in osteomyelitis?
Gram positive cocci - S. aureus
Rx for osteomyelitis?
IV cefuroxime 1 week
PO cefuroxime 5 weeks
Why are newborns more likely to be jaundiced?
Release of high conc of Hb, shorted red cell lifespan. Hepatic bilirubin metabolism less efficient in 1st few days of life.
Jaundice in neonate from 2-14 days - common & physiological - common in breastfed babies
Newborn presents jaundiced. What is the significane of this?
Risk of kernicterus - bilirubin crossing BBB and unconjugated bilirubin binds to basal ganglia and brainstem causing encephalopathy
Why might a neonate present with jaundice in the first 24 hours of age?
Always pathological Haemolysis: some blood group O women have IgG anti-A-haemolysin which crosses placenta and haemolyses red cells in group A foetus Rhesus haemolytic disease Hereditary spherocytosis G6PD
Infant presents with jaundice 1 week old. What might be the cause?
physiological, breast milk jaundice, dehydration, infection
If signs of jaundice after 14 days - do prolonged jaundice screen:
Conjugated & unconjugated bilirubin (if raised conjugated bilirubin - could indicate biliary atresia - requires urgent surgical intervention)
Anti-globulin test (Coombs’ test), TFTs, FBC & blood film, urinie for MC&S, U&E, LFT
Signs of kernicterus?
Jaundice spreading from head to trunk and limbs
Irritability, increased muscle tone (opisthotonus - lies with arched back), seizure, coma
Management of jaundice?
Check bilirubin level w/ transcutaneous bilirubin meter/blood sample
Water and dextrose sln
Phototherapy - 450nm light converting unconjugated into water soluable
What are the signs of respiratory distress syndrome?
Tachypnoea - over 60 breaths per min Tachycardia Laboured breathing Cyanosis Nasal flaring Expiratory grunting Chest wall (inter/subcostal/suprasternal) recessions Tracheal tug
Neonate (male) born at 27 weeks gestation presents with cyanosis, chest wall recessions, nasal flaring, grunting, and tachypnoea. Mother is diabetic, C section birth & was 2nd born of premature twins. Dx and Management?
Dx: Respiratory distress syndrome
Rx: pre-emptively - mother given corticosteroid - to induce fetal lung maturation
CXR
CPAP/high flow O2 from nasal cannula
Surfactant therapy via tracheal tube/catheter
Cause of respiratory distress syndrome?
Surfactant deficiency from Type 2 pneumocytes - as produced after 24 weeks. If born before 28 wks - increased risk
CXR appearance in RDS?
Ground glass opacity with or w/o indistinct heart border
What is early infection in neonates?
Infection in <48hrs of life
Bacteria from birth canal and amniotic fluid –> pneumonia and bacteraemia.
Congenital viral infection from mother via placenta
RF: Prolonged/premature rupture of membranes
How might a septic neonate with early infection present?
Fever, poor feeding, vomiting, resp distress, abdo distension, jaundice, bradycardia, seizures
Meningism: tense/buldging fontanelle, head retraction
Management for early neonatal sepsis?
CXR, septic screen - FBC, CRP, blood cultures (MC&S), LP if neuro signs
IV antiobiotics - benzylpenicillin/amoxicillin if Gram +ve, gentamicin for -ve
Potential complication of RDS?
Pneumothorax
Management of pneumothorax?
Trans-illumination of chest
Oxygen
Possibly place chest drain
Potential complication of pneumothorax?
Brain injury - intra/periventricular haemorrhage in germinal matrix
Ix and Rx of ?haemorrhage
Ix: Transcranial USS
Rx: LP/Ventriculoperitoneal shunt
Pathogen for common cold/coryza?
rhinovirus, coronavirus, repiratory syncytial virus (RSV)
10 month infant presents with fever and ear tenderness. O/E tympanic membrane bright red and buldging. Dx and cause?
Acute otitis media. RSV/rhinovorus/H. influenzae
Complication(s) of otitis media?
mastoiditis, meningitis
Rx of otitis media?
Paracetamol/ibuprofen. Amoxicillin if child unwell for 2-3 days
3 year old chil presents with pain, swelling and tenderness over cheek. dx and Rx?
Sinusitis. broad spec abx/analgesia
2 year old child presents in A&E in autumn with hoarseness, barking cough harsh stridor that is worse at night. O/E some signs of respiratory distress, coryzal symptoms & fever. Cause and Rx?
Croup (laryngotracheobronchitis) - mucosal inflammation and increased oedema and secretions - parainfluenza (also RSV, rhinovirus)
Rx: DO NOT EXAMINE THROAT/moist air inhalation (causes great pain)
Moderate/severe croup -> admit
PO dexamethasone 150MICROg/kg, prednisolone, nebulised adrenaline, analgesia, high flow O2 if low sats, n
2 differentials to croup?
Pseudomembranous croup (bacterial tracheitis) Acute epiglottitis
18 month child - barking cough, stridor, very high fever and appears toxic. Cause and rx?
Bacterial tracheitis - S. aureus.
Rx: IV cefotaxime and clindamycin
4 year old child presents with septicaemia, shock, minimal cough, v painful throat, drooling, soft stridor. Found sat upright and mouth wide open in A&E. Cause and Rx?
Acute epiglottitis - H. influenzae (type b).
Rx: Refer for laryngoscopy, call anaesthetist, ENT, paediatrician and intubate (or tracheostomy if unable)
Blood cultures
IV cefuroxime
Rifampacin to close contacts
A 3 month old infant presents to A&E with rhinorrhoea, cough, mild fever (<39), wheeze, SOB and RD signs.
O/E - cyanosis, widespread fine inspiratory crackles, tachycardia, lung hyperinflation (liver and spleen palpable). Cause and risk factors?
Bronchiolitis - most common severe LRTI - viral infection of bronchioles.
Common: Resp syncytial virus, human metapneumovirus, adenovirus
Uncommon: rhinovirus
RF: Winter, older siblings, nursery attendance, passive smoke, worse if bronchopulmonary dysplasia (premature), congenital heart disease, CF
Ix for bronchiolitis?
Pulse oximetry
Immunofluorescence of nasopharyngeal aspirate - RSV rapid antigen test
If uncertainty: CXR - hyperinflation of lung, focal atelectasis, flattening of diaphragm
FBC, U&E
Cultures if: pyrexia >38.5 or child is toxic
Rx for bronchiolitis
Mostly self limiting 7-10 days
Supportive: humidified O2 via head box (esp if sats <92% OA), monitor O2 sats, NG feeding/fluids, resp support
Suction for ++ secretions
Refer if: abnormal feeding 50%+, increased resp effort, cyanosis, RR>70, sats <94%
Prevention of bronchiolitis?
Palivizumab - MCAB against RSV - reduces admissions but expensive and IM injection
Vaccination - if immunodeficient
Infection control
2 yr old presents w/ fever >38.5, cough for 13 days, rapid breathing, lethargy, poor feeding. Recently had URTI.
O/E: tachypnoea, nasal flaring, grunting, end inspiratory coarse crackles
Dx: Bacterial Pneumonia
Inflammation of lung parenchyma excluding bronchi - caused by colonisation of nasopharynx
New born: B strep, enterococci
Infants: RSV, S. pneumoniae, H. influenzae
Over 5s: S. pneumoniae, M. peumoniae
Diagnostic definition of pneumonia and what would indicate it is bacterial in nature?
Cough and breathing difficulty for <14 days. Bacterial usually if child <3 yrs w/ fever >38.5, resp rate >50
Ix and Rx of pneumonia?
Ix: CXR shows dense fluffy opacities occupying portion/whole lobe, blunting of costo-phrenic angle
Rx: O2 sats if <92%, IV fluids, broad spec abx if newborn, amoxicillin if older
Macrolides if no response if if suspected mycoplasma/chlamydia
If associatd w/ influenza - co-amoxiclav
2 mo old presents with a 2 week history of a worsening spasmodic cough worse at night that is like a whoop often followed by vomiting. The child has epistaxis and subconjunctival haemorrhaging. What could Dx be? Cause? How would you investigate and treat?
Pertussis/whooping cough - caused by Bordetella pertussis.
Ix: Pernasal swabs and PCR
Rx: Macrolides eg clarithromycin for 3 weeks in catarrhal phase
Abx prophylaxis to household contacts
School exclusion - 48hrs after commencing abx or 21days from onset of symptoms if no abx
Prevention: pregnant women get vaccine 20-32 weeks
Complications of pertussis?
Prolonged illness, petichae on cheek, retinal/conjunctival bleeding, , inguinal hernias, frenual tears, bronchiectasis
2 yr old just returned from family visit to Bangladesh presents with cough, anorexia, failure to thrive, malaise. Likely Dx and cause? Ix?
TB - M. tuberculosis
Ix: Tuberculin test, IFN-gamma release array blood test, blood cultre with Ziehl-Neelson stain
CXR: consolidation and cavities. Miliary spread (fine white dots) rare but grave
Rx of TB. Monitoring and Risk of these drugs?
Rifampicin, Isoniazid, pyrazinamide.
Check LFTs and U&E before. Rifampicin can increase bilirubin. Isoniazid can cause neuropathy (give pyridoxine)
When should you suspect primary immunodeficiencies? How should you manage?
SPUR Significant Persisent Unusual Recurrent infections Boys - as many are X-linked Rx: Prompt and liberal abx T cell defects - Pneumocystis jiverocii pneumonia - Co-trimoxazole B-cell defect - bronchiectasis - azithromycin
5 yr old child presents with an persistent and recurrent expiratory wheeze, which is worse at night and in the morning. Has hay fever and eczema. Probable dx and cause?
Asthma
Atopic - IgE mediated by dust mites, pollen and pets with associated eczema and hay fever.
Non atopic - allergens, cold air, smoking, exercise, anxiety
Path: bronchial inflammation with oedema, increased mucus production and T cell infiltration and airway narrowing
Dx and Ix of asthma?
Peak flow - diurnal variation
Skin prick test to see triggers
CXR usually normal can r/o other
Rx of asthma
1) Short acting beta2 agonist (SABA) - salbutamol
2) SABA +
Very low (paediatric dose) inhaled corticosteroid (ICS) - beclametasone eg clenil
3) SABA + PD ICS + leukotriene receptor antagonist (LTRA) eg Montelukast
4) SABA + ICS + LABA
5) SABA + mainentaince and reliever therapy (MART) - ICS, with fast acting LABA (eg formoterol) in single inhaler
6) increase dose of ICS MART
7) SABA + one of:
Increase ICS to high dose, add theophylline
If child is <5 - stop at step 3 (SABA + ICS + LTRA) and then refer to paediatric asthma specialist
Describe a moderate, severe and life threatening acute asthma attack
Acute (moderate): moderate O2 sats >92%, peak flow > 50% predicted, no clinical features of severe asthma
Severe: Too breathless to talk/feed, use of accessory muscles, increased RR, tachycardia, peak flow 33-50% predicted
Life threatening: Silent chest, altered consciousness, cyanosis, <92% saturations, peak flow <33% predicted, poor respiratory effort
CXR might show harrisons sulci on CXR (horizontal groove along lower thorax)
Rx of acute asthma attack?
Oxygen
Salbutamol Neb via spacer
Hydrocortisone IV
Ipatropium bromide
If not responding:
IV salbutamol/aminophylinne, IV Mg SO4, HDU
If responding: prednisolone PO 3-5 days
Describe the aetiology and pathology of cystic fibrosis
Autosomal recessive defect in cystic fibrosis transmembrane conductance regulator (CFTR) gene on chrms 7 (delta508 on long arm)- leading to defective Cl- channel –> reduced Cl- transport out of cells and increased Na+ reabsorption -> water drawn in –> thicker mucous and secretions –> Infections w/ Pseudomonas aeruginosa, S aureus, Aspergillus, Burkholderia cepacia
Clinical features of CF in newborn? How is it diagnosed? what immediate treatment given?
Meconium ileus (failure to pass meconium in 24hr - v thick and sticky) –> give gastrografin enema or surgery
Exocrine insufficiency - lipase, amylase, proteases
Hyperinflation of chest due to air trapping
Prolonged jaundice
Sx of CF in infancy?
Meconium ileus
Failure to thrive
Recurrent chest infections - S. aureus, p. auruginosa, h. influezae
Malabsorption and steatorrhoea
Sx of CF in young child?
Bronchiectasis
Sinusitis
Rectal prolapse (due to bulky stools)
Nasal polyps
Sx of CF in adolescent?
Short stature Delayed puperty Allergic bronchoplmonary aspergillosis DM Cirrhosis and portal HN Distal intestinal obstruction syndrome Sterility in males
Ix of CF?
Sweat test - elevated Cl- levels (normal 10-40nmol/L, CF if >60) - stimulate using pilocarpine ionotrophersis - collect in capillary tube and filter paper
Note: false positive if: malnutrition, adrenal insufficiency, glycogen storage disease, nephrogenic DI, hypothyroidism, hypoparathyroidism, G6PD
False negative: skin oedema (pancreatic exocrine insufficiency –> hypoalbuminaemia/hypoproteinaemia)
Faecal elastase - low levels (exocrine insufficiency)
Genetic testing of CFTR chrms 7
Spirometry - FEV1 indicates severity
Management of CF?
Review annually
Resp - Physiotherapy BD - deep breathing, exercise
Airway clearing - chest percussion and postural drainage
Minimise contact w/ other CF patients - minimise cross infection
Abx prophylaxis - PO flucloxacillin, nebulised ciprofloxacin
Nutrition - pancreatic replacement, high calorie & fat diet, fat soluble vitamin supplements, enteric coated replacement at every meal, feed overnight w/ gastrostomy
Bilateral lung/heart transplant - end stage
If CF pt has homozygous delta F508 mutation:
Lumacaftor - increases number of CFTR proteins transported to cell surface
Ivacoaftor - potentiator of CFTR that are already at cell surface - allows more channels to be open
Signs and causes of hypermobility?
Cause: normal younger females, can be sign of
Ehlers-Danlos - AD connective tissue disorder - affects collagen III -> tissue more elastic
Elastic, fragile skin Pain confined to lower limb, symmetrical hyperextension of thumbs and fingers, elbows and knees hyperextended beyond 10 degrees, palms placed on floor without bending knees (joint hypermobility) Joint dislocation Easy bruising Aortic regurg, mitral valve prolapse, aotic dissection SAH, angioid haemorrhage also: Downs, Marfans
14 yr old child male presents w/ knee pain after exercise, swelling over tibial tuberosity and hamstring tightness. Cause and rx?
Osgood Schlatter - (tibial apophysitis) - type of osteochondritis of patella tendon insertion at tibial tuberosity - caused by repeated avulsion of apophysis where patellar tendon inserted into.
Rx: reduce activity, physiotherapy, hamstring stetches, orhthotics
5 yr old boy presents with sudden onset pain in hip and thigh. No pain at rest but decreased ROM, especially internal rotation of hip, low grade fever. Had recent viral infection. Dx and Rx?
Transcient synovitis (irritable hip) Rx: bed rest and analgesia (supportive)
What is Perthes disease and what would a common presention be?
Avascular necrosis of capital femoral epiphysis of femoral head due to interruption of blood supply and revascularization and reossification over 18-36mo - causing infraction of bone
Males 4-8 from low socioeconomic background with limb, hip and knee pain, stiffness and reduced hip ROM
Ix and Rx of Perthes?
Ix: X-ray of both hips - early changes - widening of joint space, increased density in femoral head (decreased size), flattening & sclerosis
If symptoms persist and on XR - can do technetium bone scan or MRI
Rx: rest, physiotherapy, traction, plaster casts and braces, surgery
Complications: OA and premature fusion of growth plates
7 yr old girl presents with joint swelling and pain in joints along with sore/red eyes and dysuria. recently had food poisoning with Campylobacter. Dx and Rx?
Reactive arthritis
NSAIDs
18 month (<2yr) old child presents acutely unwell, febrile (fever >38.5), with erythematous, tender joint they are holding still. They cry if it is moved. Dx and cause of this/
Septic arthritis - infection of joint space usually with S. aureus, H. influenzae from haematogenous spread, or adjacent osteomyelitis, wound puncture, infected skin lesion
Ix and Rx of septic arthritis?
Ix: raised WCC, cultures, USS, Xray to r/o trauma, joint aspiration and cultures
Rx: Iv antiobiotics - flucloxacillin, surgical drain/lavage joint
What are the signs and management of a non-accidental fracture?
Inconsistent story, neglected child, previous healed fractures
Rx: Initial medical management and refer to social services, possibly police
What is a septic screen and what does it screen for?
Blood culture, FBC w/ WCC, U&E, CRP, urine sample
How is close contact defined?
prolonged contact in household setting for 7 days prior to illness
C/I and important considerations to meningitis prophylaxis
Rifampacin - interacts w/ OC pill which reduces efficacy, antivirals, atorvastatin, warfarin, teratogenic, also stains secretions orange (rifampicin not used anymore)
Ciprofloxacin - risk of C diff
15 (<16) yr old had persistent joint swelling for >6 weeks with stiffness after long periods of rest (gelling) in the morning and long car rides in 4 different joints, a salmon pink rash and deterioration of mood. Dx and Ix?
Juvenile idiopathic arthritis (systemic onset = Still’s disease)
Bloods - normal FBC, inflamm markers, negative Rh factor.
Antinuclear factor positive in oligoarthropathies
Difference between poly and oligoarthropathies?
Based on no. of joints affected in 1st 6 months
Poly = more than 4
Oligo = 1-4
Name 6 systemic features of JIA
Fever, salmon-pink rash,Lymphadenopathy, organomegaly, serositis, , uveitis, anorexia and weight loss
macrophage activation syndrome: high fever, purpuric rash, hepatosplenomegaly, raised ferritin
Complications of JIA?
Anterior uveitis, flexion contracture of joints, growth failure (anorexia), anaemia, delayed puberty, osteoporosis, amyloidosis (rare but leads to proteinuria and renal failure)
Rx for JIA?
Methotrexate
NSAIDs
Intra-articular corticosteroid injections
Systemic steroids - avoid due to growth failure and osteoporosis - pulsed IV methylprednisolone
Cytokine immunotherapies - anti-TNFa - Entanercept/infliximab
Which professionals should care for a child with JIA?
Paediatric rheumatologists and nurses w/ knowledge of disease and treatment for family education, ophthalmologists, orthopaedics, physio, OT
12 (10-15) year old overweight boy presents with waddling gait, groin and knee and distal thigh pain. OE inability to internally rotate leg when in flexion. Dx, Cause and management?
Dx: Slipped upper femoral epiphysis (SUFE)
Cause: displacement of epiphysis postero-inferiorly
Management: AP + lateral X-ray (frog leg)
Internal fixation - single cannulated screw in centre of epiphysis to prevent avascular necrosis
Difference between wheeze and stridor?
Wheeze: Obstruction of intrathoracic (lower) airways –> increased effort and added expiratory noises
Stridor: Obstruction of upper airways (trachea and larynx) –> increased effort and added inspiratory noises
What are common signs of osteoporosis in children?
1 or more vertebral crush fractures
Autosomal recessive
Radiology: lack of differentiation between cortex and medulla - ‘marble bone’
Name 3 inherited causes of osteoporosis
Osteogenesis imperfecta
Inborn error - galactosemia
Haematological problems
Name 5 acquired causes of osteoporosis
Drug - steroids endocrinopathies malabsorption immobilisation inflammation
Infant presents with impaired growth, fractures, deformity, deafness, blue sclera, triangular face, spinal curvature and hernias. They have bone pain.
Dx, cause and management?
Osteogenesis imperfecta - autosomal causing defects in type 1 collagen (decreased synthesis of pre-alpha 1 or pro-alpha 2)
They are deaf due to otosclerosis
Rx: MDT, bisphosphonate eg pimidronate
Cause, presentation and management of rickets/osteomalacia?
Cause: Lack of vitamin D
Pres: bowed legs, knock-knees w/ splayed metaphysises
Funnel chest
Slow growth
Hypotonia (hypocalcaemia)
Fractures
Osteomalacia: bone pain, proximal myopathy, muscle tenderness, fractures
Ix: low 25(OH) vitamin D, raised alk phos, low Ca and phosphate
XR: cupped, ragged metaphyseal surfaces
Rx: Vitamin D supplements + calcium
Cause, presentation, management of vitamin D defficiency?
Usually from maternal insufficiency Bowed legs Hypocalcaemic convulsions Gross motor delays Carpo-pedal spasm Rx: Vit D and calcium
7 month infant presents with non blanching rash raised off the skin over lower limbs (extensor surfaces) and buttocks, polyarthritis, abdo pain, haematuria and proteinuria. Likely Dx and Rx?
Henoch-Shoenlein purpura - an IgA mediated small vessel vasculitis
Rx: paracetamol
Supportive eg fluids
Monitor renal function - if worsening - biopsy kidney
If significant renal pathology = steroid and immunomodulation (limited evidence)
Triad of HSP?
Purpura
Arthritis
Abdo pain
1 yr old girl (think 6mo-5yr) afro-Caribbean origin (or Chinese/Japanese) presents w/ 6 (>5) day spiking fever of >39, cracked lips, strawberry tongue, bilateral non-purulent conjunctivitis (conjunctival injection), palmar & sole erythema, oedema, desquamation of hands and feet, cervical lymphadenopathy, non-vesicular widespread rash. Like dx and cause?
Kawasaki’s disease - idiopathic self limiting auto-immune systemic vasculitis of small/medium arteries
Presentation and cause of septicaemic rash secondary to meningitis?
Non blanching purpuric rash with re/purple petichae (<3mm). Bleeds below skin due to consumputive coagulopathy (DIC). Endotoxins from bacteria cause thrombosis, consumption of platelets and clotting factors not produced by liver –> bleeding
Diagnostic criteria of Kawasaki’s?
4 of: inflammatory mouth, lips, tongue, pharynx
Bilateral non-purulent conjunctivitis
Erythema, oedema, desquamation of hands/feet
non-vesicular widespread rash
cervical lymphadenopathy
OR
Coronary artery aneurysms on echo
Complications of Kawasaki’s?
Coronary -> artery aneurysms -> narrowing vessels from scar tissue –> myocardial ischaemia and sudden death
Gallop rhythm, myocarditis, pericarditis
Mortality 1-2%
Ix for Kawasakis?
High CRP, ESR and platelets (2nd week)
Echocardiography - check for cardiac vessel aneurysms/pericarditis
ECG - other cardiac involvement
Rx and their risks of Kawasaki’s?
High dose aspirin - Reyes syndrome is risk - severe progressive encephalopathy affecting children and accompanied by fatty infiltration of liver, kidneys and pancreas. causes vomiting, lack of energy, brain damage.
More commonly GI upset, bleeding/buising
IV IG - analphylaxis, renal failure, headache, N&V
Mg
Severe cases: steroids, anti-TNF, ciclosporin
PCI for coronary complications
4 (2-6) yr old presents with fine punctate erythema (pin head) on torso, facial flushing, circumoral pallor, strawberry tongue. Rash then on chest, axillae, and behind ears. High fever, malaise, headache, N and V. Likely dx, cause and rx? complications if unctreated?
Scarlet fever - erythrotoxins released from strep. pyogenes. (Group A strep)
Dx: throat swab but commence abx immediately
Rx: Penicilin V (azithromycin if allergic) for 10 days.
Return to school 24 hr after starting abx
Notifiable disease
Can cause otitis media (most common)
glomerulonephritis - 10 days after, rheumatic fever (infective endocarditis) - 20 days after
Name some normal/unharmful birth marks/rashes in newborns
Strawberry marks
Port wine stain - permanent capillary haemangioma
Naevi
Mongolian blue spot - dark marks
Café au lait patch - but be aware >5 = neurofibromatosis
Milia/milk spots = sebacius plugs
Infantile urticaria - erythema toxicum - histamine reaction
11 months infant presents with itchy macular rash followed by papules, vesicles, and crusty pustules which are very itchy. Recent history of high fever. Dx? Cause? Complications?
Chicken pox - from varicella zoster virus.
Can cause
Secondary bacterial infection of lesions - usually cellulitis but rarely invasive group A strep - can cause necrotizing fasciitis
gingivostomatitis, eye disease (blepharitis, conjunctivitis, corneal ulceration), aseptic meningitis, encephalitis
Pneumonia
Encephalitis (+/- cerebellar involvement)
Disseminated haemorrhagic chickenpox
Arthritis, nephritis, pancreatitis rarely
Mx: Keep cool, trim nails, calamine lotion
School: exclude for 5 days after onset of rash
Immunocomprimised and newborns w/ peripartum exposure - receive varicella zoster IG
If chicken pox develops - give IV aciclovir
Painful rash in dermatomal region under axilla. Cause?
Reactivation of HSV and neuronal infection = shingles
What is the 6 in 1 vaccination and when do infants get it?
Diptheria, tetanus, pertussis, polio, Hib, hepatitis B.
8, 12 and 16 weeks
When rotavirus vaccination?
8 and 12 weeks
When pneumococcal vaccination?
8 and 16 weeks, 1yr
when men B vaccination?
8 and 16 weeks, 1 yr
Hib and Men C vaccination?
1 year of age
MMR vaccination?
1 year and 3 yrs 4 months
What is the 4 in 1 vaccination and when?
Diphtheria, tetanus, whooping cough, polio
3yrs and 4 months
When to give BCG?
Child likely to come into contact with TB in at risk countries
When to give a flu vaccine?
“at risk” groups
What is the 3 in 1 teenage booster and when to give?
Diphtheria, tetanus, polio - 14 yrs
Men ACWY?
14 years and freshers
When give chickenpox vaccine?
If at risk to giving to immunocompromised sibling
When HPV?
12-13 yr old female and males! and booster 6 months later
How is short stature defined and what makes it more likely to be pathological?
Height below second centile (2SDs below mean). Further from mean - more likely to be pathological
Measure height velocity
Compare to weight
Compare to genetic expected height - mean of fathers and mothers.
7cm added if boy, 7cm subtracted if girl
Normal causes for short stature?
Familial - short parents
Constitutional delay - normal variety
Causes of pathological short stature?
Extreme prematurity
Chromosomal disorder - Downs, Turners, Noonan
Nutritional - coeliac, crohns, CF, congenital heart defect
Psychosocial deprivation
Endocrine - hypothyroidism, iatrogenic corticosteroid/cushings
What treatment can you give to short stature children and in what circumstances?
Biosynthetic growth hormone SC OD in:
GH deficiency, prada-willi syndrome, CKD
Causes of pathological tall stature and Rx?
Endocrine: congenital adrenal hyperplasia, precocious puberty (early epiphyseal fusion)
Genetic: Marfan, Klinefelter
Rx: testosterone/oestrogen therapy - induce early epiphyseal fusion
Define premature sexual development
Development of secondary sexual characteristics before 8 in females and 9 in males
Causes of precocious puberty in girls? How might this be ruled out?
Gonadotrophin dependent - true:
Ovaries sensitive to gonadotrophins - due to premature activation of the hypothalamic-pituitary-gonadal axis - FSH and LH raised
Gonadotrophin independent: due to excess sex hormone - FSH and LH low
Congenital adrenal hyperplasia –> excess androgens
Pituitary tumour
R/o w/ USS ovaries - pear shape
causes of precocious puberty in boys? What investigation
Testes not sensitive to gonadotrophins (independent)
Adrenal pathology - tumour/hyperplasia - has small testes
Bilateral testes enlargement - intracranial tumour (hypothalamus)
Unilateral gonadal enlargement - gonadal tumour (eg Leydig tumour)
Ix: MRI hypothalamus
Management of precocious puberty?
Detect underlying pathology
Address psychological/behavioural difficulties
Dependent: GnRH analogues, independent: inhibitors of androgen production eg medroxyprogesterone acetate
Define delayed puberty
absence of pubertal development by 14 yrs in females, 15yrs in boys
Causes of delayed puberty?
Constitutional delay - most common
Low Gn secretion - CF, crohns, anorexia nervosa, Kallman syndrome (LHRH deficiency and inability to smell), hypothyroidism
High Gn secretion - Klinefelter (47, XXY), Turner (45, XO)
Delayed puberty w/ short stature:
Turner’s syndrome
Prader-Willi syndrome
Noonan’s syndrome
Delayed puberty with normal stature polycystic ovarian syndrome androgen insensitivity Kallman's syndrome Klinefelter's syndrome
How do you assess male puberty
Pubertal staging using testicular vol
Rx for pubertal delay?
Often not needed - reasurrence
If required - oxondrolone - androgenic anabolic steroid - iduce growth catch up
How might an undescended testes present - 3 different types - and how is it managed?
Dx on routine examination
Palpable - seen/felt in groin - cannot be manipulated
Impalpable - inguinal canal, intraabdo or absent
Retractile - can be manipulated into scrotum with ease
Rx: Orchidoplexy - surgical placement of testis in scrotum
2 week old female neonate presents with faltering growth, feeding problems, jaundice, constipation, hypotonia, puffy face, pale mottled skin, hoarse cry, large tongue. Dx, potential cause and Rx?
Congenital hypothyroidism - Dysgenesis - failure of descent from base of tongue to normal
Iodine deficiency - world wide
Dyshomonogenesis - thyroid hormone synthesis error
Rx: Normal neonatal screen - cord blood/filter paper spots - raised TSH
Levothyroxine 10-15micrograms/kg/day
13 yr old girl presents with weight loss, sweating, diarrhoea, tremor, tachycardia and palpitations, and behavioural problems. Likely dx, cause, Ix and Rx? Potential risk of treatment
Dx: Hyperthyroidism - often from autoimmune thyroiditis - anti-thyroid-stimulating immunoglobins
TFT - TSH v low, T3/T4 v high, antithyroid peroxisomal antibodies present
Rx: Carbimazole/propylthiouracil - but risk of neutropenia (look for sore throat/high fever)
How could you differentiate between different causes of congenital hypothyroidism?
USS/radioisotope scan as dysgenesis is a structural abnormality
Screening has helped prevent primary congenital hypothyroidism (cretinism). What are the symptoms?
Mental/physical disability, faltering growth, feeding problems, prolonged jaundice, constipation, pale/cold/mottled skin, coarse facies, large tongue, hoarse cry, goitre
5 yr old girl presents with weight loss for 3 weeks, polyuria, polydipsia. Recently became unresponsive, had stomach pain, low GCS, dehydration, vomiting, kussmauls breathing (deep and rapid), pear-drop breath. How would you manage this child and what is the likely dx? How is it defined?
Diabetic ketoacidosis - hyperglycaemia (>11.1mmol/L)- due to uncontrolled lipolysis - results in excess free fatty acids converted into ketone bodies
, acidosis (venous pH<7.3)
Immediately 0.9% (10ml/kg) w/ 40mmol KCl for first 12 hours -correct dehydration be wary of cerebral oedema too fast
Insulin (fast acting eg Actrapid) (0.1 units/kg/hr) after 1 hour - gradual reduction
Confirm dx w/ hx/finger prick test, FBC, weigh, U&E, Ca,
Calculate correct fluid vol infusion w/ KCl 20mmol/500mL.
+ 5% glucose if blood glucose <14mmol/L
After 12 hr - when plasma sodium stable - 0.45% saline + 5% glucose + 20mmol/500mL KCL
Stop insulin when ketones are <1mmol/L
Monitor and treat infection
10 day old neonate presents collapsed and shocked. What is the differential dx of unwell neonate?
- Sepsis/infection
- Cong heart defects (VSD/ASD)
- Persistent pulmonary hypertension
- Surgical emergencies – eg necrotizing enterocolitis
- Trauma
- Inborn errors of metabolism
Immediate management of collapsed and shocked neonate?
IV saline, glucose, hydrocortisone
Neonate is vomiting, dehydrated, has ambiguous genitalia.
U&E shows low Na, high K, increase in plasma 17-hydroxyprogesterone and metabolic acidosis. Dx and cause?
Congenital adrenal hyperplasia - caused by deficiency of: 21/11/17-alpha hydroxylase from CYP21.
Cortisol inadequately produced –> increased adrenocortical precursors/adrenal hyperplasia/overproduction of androgenic cortisol precursors –> v high testosterone
How would you manage a neonate with congenital adrenal hyperplasia in first 24 hrs and why?
Mineralcorticoids - fludrocortisone if salt loss
NaCl after
Neonates often salt losers as 21-hydroxylase needed for aldosterone synth
How would you manage a child with congenital adrenal hyperplasia after initial presentation?
Lifelong glucocorticoids eg hydrocortisone - supress ACTH levels (and thus testosterone) normal growth
- Monitor growth, skeletal maturity, plasma androgens and 17α-hydroxy-progesterone (insuffiency increased ACTH/androgens excess rapid growth of skeletal maturation at expense of final height (excess hormone skeletal growth)
- Additional hormone replacement
How might an older boy present with CAH?
Large penis and scotum pigmented
How might an older girl present with CAH
Virilisation of external genetalia, clitoral hypertrophy, fusion of labia
- Salt-losing crisis less common in girls as virilisation noted early
- Tall stature in 20% of non salt-losers – both male and female – muscular build, adult body odour, pubic hair, acne from excess androgens precocious puberty
- Later: psychosexual problems from high androgens
Antenatal treatment for CAH?
Prenatal diagnosis if previous child affected
- Dexamethasone given to mother supress foetal androgen over secretion.
6 year old girl presents with a 3 week history of polyuria, lethargy, polydipsia, weight loss, poor growth and recent infections. What is the dx, cause and diagnosis?
Type 1 diabetes mellitus - caused by T cell mediated destruction of beta cells in islets of Langerhans.
Dx: signs of hyperglycaemia with venous blood glucose of 7mmol/L (fasting)/>11.1mmol/L (random).
Or raised glucose on 2 occasions, no symptoms
Autoantibodies: anti-islets of Langerhans, anti-insulin, anti-GluAD