Haematology Flashcards
How is haemophilia inherited
X-linked recessive
Blood findings of haemophilia
Prolonged APTT
PT, bleeding time, thrombin time all normal`
Low of respective factors
If a female has haemophilia what do they likely have
Turners
What must be avoided in haemophilia
NSAIDS and aspirin
What advice should be given to parents with haemophilia
Present ASAO to hospital if slight trauma
4 complications of haemophilia
Chronic arhtropathy
Compartment syndrome
Haematuria
HBV infection related to transfusion
Male versus female with reduced factor 8
Male- haemophilia A
Female- vWD
Traetment of haemophilia chronically
Done at haemophilia centre- MDT approach
Mild to moderate haemophilia A- desmopressin
Severe- prophylactic factor replacement
Why is desmopressin used to treat haemophilia A
Stimulates F8 and VWF release
Treatment of acute haemophilia
IV infusion of respective factor
Minor bleeds- raise to 30 % of normal
Major- raise to 100% and maintain at 30% for 2 weeks to prevent haemorrhage
How is haemophilia graded
Mild will bleed after surgery (>5% of factor)
Moderate will bleed after minor trauma (1-5% of factor)
Severe will bleed spontaneously (<1% of factor)
What is cows milk protein allergy
An allergic reaction to cows milk protein in formula fed milk but can occur in breatfed if protein present in mothers milk
How can IgE mediated allergy present
Urticaria
Facial swelling
Nausea
D&V
Itching
Sneezing
Rhinorrhoea
How can non-IgE mediated food allergy present
Erythema
Atopic eczema
GORD
Change in frequency of stools
Aversion of food
Infantile colic
Investigations for cows milk allergy and food allergy
Allergy focussed history- avoidance etc, have they trialled re-introducing allergen
Test 1- skin prick test
Test 2- total IgE or specific IgE (RAST)
What is RAST
Another term for allergen specific IgE
Management of Cows milk allergy
- Avoid trigger
If formula fed use hypoallergenic formula
If breast fed exclude from diet (takes2-3 weeks tho)
Can give calcium and vit D supplements - must regularly monitor growth
- Reintroduce in 6-12 months using Milk Ladder
Difference in formula given to formula fed babies CMPA
Mild and moderate- hydrolysed
Severe- amino acid based formula
What can be given in CMPA to breast fed children
Give mum calcium and vit d supplements
What is immune thrombocytopenia
Immune mediated disease against glycoprotein IIb/IIIa or Ib-V-IX-complex
How does ITP present in children
Recent infection/vaccine
Brusing
Petechial/purpuric rash
Rarely epistaxis or gingival bleeding
Investigations for ITP
FBC- isolated thrombocytopenia
Blood film
Bone marrow examination if lymph node enlargement, splenomegaly, failure to respond to treatment
Management of ITP
Mainly benign and self limiting- resolves in 6-8 weeks
Treat only if major bleeding or persistent minor bleeding
Managment of ITP if major bleeding
IVIG
Corticosteroids
Anti-Rhd
Plt transfusion if life threating
Traetment for chronic ITP 1st line and second
Mycophenolate motefil
Rituximab
Eltrombopag
Second- splenectomy
What is eltrombopag
A thrombopoietin agonist
What is strawberry tongue seen in
Scarlet fever
Presentation of scarlet fever
Tonsilitis
Fever
Malaise
Maculopapular rash
What is rash like in scarlet fever
fine punctate erythema (‘pinhead’) which generally appears first on the torso and spares the palms and soles
Has rough sandpaper texture
Spares feet and hands
Treatment for scarlet fever
Oral penicillin V for 10 days
Azithromycin if penicillin allergic
Can go back to school 24 hours after infection
Notifiable disease
Most common complication of scarlet fever and other ones
Otitis media
Rheumatic fever
Acute glomerulonephritis
Invasive complications- bacteraemia, meningitis, necrotising fasciitis
What are the different types of alpha thalassaemia and outcomes
Major with 4 alpha globulin missing- hydrops fetalis
HbH disease with 3 missing- mild/moderate anaemia with occasional transfusion
Alpha thalassaemia with 1 or 2 deleted- asymptomatic with mild/no anaemia
How does HbH disease present
Hypochromic and microcytic anameia with splenomegaly
What is thelarche
First stage of breast development
What is adrenarche
First stage of pubic development
How is precocious defined
The development of secondary sexual characteristics before 8 years in females and 9 years in males
Much more common in females
How is precocious puberty classified
Gonadotrophin dependent (central or true)- premature activation of hypothalamic-pituitary-gonadal axis. FSH and LH high
Gonadotrophin independent (pseudo, false)- due to excess sex hormones. FSH and LH low
How to determine cause of precocious puberty from testes
Bilaterally enlarged- gonadotrophin dependent
Unilaterally enlarged- gonadal tumour
Small- adrenal cause
Faractures associated with non-accidental injury
Metaphyseal
Posterior rib
Fractures at different stages of healing
What is a bucket handle fracture
Fracture of the metaphyseal corner in tibia
Seen in NAI
Risk factors for rickets
Dietary feeding of calcium
Prolonged breastfeeding
Lack of sunlight
Unsupplemented cows milk formula
Presentation of rickets
Aching bones and joints
Waddling gait
Kyphoscoliosis
Forehead bossing
What is kyphoscoliosis
Deviation of the spine laterally (scoliosis) and anteriorly (kyphosis)
Joint findings of rickets
Widening of joints
Rickety rosary- bony prominences at costochondral joint