Hematology/Oncology Flashcards
Age for physiologic nadir of Hgb
Term: 8-10 weeks
Preterm: 7-8 weeks
Etiology of physiologic anemia in newborns
Low erythropoietin production
Hemoglobin F
2 alpha + 2 gamma
Hemoglobin A
2 alpha + 2 beta
Hemoglobin A2
2 alpha + 2 delta
Diagnosing thalassemia
Hemoglobin electrophoresis
Thalassemia panel
One defective alpha allele
Asymptomatic
Alpha thal (silent carrier)
2 defective alpha allele
Mild Microcytic hypochromic anemia
Asymptomatic
Alpha thal minor/trait
3 defective alpha allele
Hemolysis
Hepatomegaly
Alpha thal intermedia
Hemoglobin Barts (at birth)
Hemoglobin H disease
4 defective alpha allele
4 defective alpha allele
Hydrops fetalis
Still birth
Alpha thal major
1 defective beta allele
Asymptomatic
Beta thal minor/trait
Progressive severe microcytic hypochromic anemia
HSM
Extramedullary hematopoesis
F only pattern on newborn screen
Small for age
Beta thal major
Copley’s anemia
Treatment for beta thal major
Chronic transfusion therapy
Transplant
Long term complications with beta thal major
Cholelithiasis
Hemochromatosis
Hemoglobin F
Hemoglobin S
Sickle cell anemia
Elevated Hgb A2 and F
Low or now Hgb A1
Beta thalassemia
Microcytic anemia
High RDW
High FEP
Iron deficiency
Lead toxicity
Microcytic anemia
Normal RDW
Normal FEP
Thalassemia
Most common environmental illness in kids
Lead poisoning
Gold standard test for lead poisoning
Whole blood (NOT fingerstick) lead level
Ringer sideroblast
Iron poisoning
Sideroblastic anemia
Elevated Methylmalonate and homocysteine levels
B12 deficiency
Anemia
Cows milk
Iron deficiency
Anemia
Goat milk
Folate deficiency
Only elevated homocysteine level
Folate deficiency
Hemolytic anemia
No elevated retic count
Parvovirus in sickle cell or hereditary spherocytosis
IgG
SLE
Lymphoma
Ceftriaxone
Penicillin
+ Spherocytes
Treatment
Warm autoimmune hemolytic anemia
Tx: steroids, rituximab, splenectomy
IgM
B cell lymphoma
Mono/EBV
Influenza
Mycoplasma
No Spherocytes
Treatment
Cold autoimmune hemolytic anemia
Tx: avoid cold, rituximab. No steroids.
Hemolytic anemia
X-linked
Oxidative stress
Heinz bodies, helmet/blister cells
Diagnosis
G6PD deficiency
Test several weeks after episode (2-3 mo). Testing near time of diagnosis can lead to false negative results
Cytoskeleton spectrin membrane defect
Negative coombs test (non immune hemolysis)
Osmotic fragility test
EMA flow cytometry
Hereditary spherocytosis
Most common cause of aplastic crisis in hereditary spherocytosis
Parvovirus B19