Hematology Flashcards
crizanlizumab MOA, route of admin, goal of treatment
p-selectin binding reduces adhesion of sickles to endothelium
IV therapy
reduce pain crises
deficiency in which enzyme causes methemoglobinemia and why cyanosis
cytochrome b5 reductase, reduced ability to turn methemoglobin to normal oxyhemoglobin, holds on to o2 and doesn’t release it to the tissues
which hemoglobinopathy is associated with methemoglobinemia and why is this important to know
HbM or H, cannot reduce with methylene blue
gene, function and inheritance for pyruvate kinase (PK) deficiency
PKLR gene, ATP production for RBC, AR inheritance
treatment for PK deficiency
Mitapivat, PK enzyme activator raises RBC count and reduces transfusions
Hemolytic anemia with Leg cramps, pain with exercise, motor regression, cerebellar tumors, mutation and inheritance
Phosphoglycerate kinase deficiency, PGK-1, xlinked
labs and smear for G6PD
blister cells, heinz bodies, acute hemolysis
shock and acute hemoglobin drop in sickle cell disease
acute splenic sequestration crisis
goal of hbF on hydrea
hgf >20
MOA voxeletor, admin route and goal of treatment
Increases affinity of hgb for oxygen and stabilizes cell to prevent sickling, oral drug, goal to increase hgb levels
moa L-glutamine
anti-oxidant
blood smear with mild sickling, crystals with RBC with distorted shapes, target cells, microspherocytes, elevated MCHC
SC disease
brilliant cresyl blue stain with golf ball inclusion
HgH disease (severe alpha thal)
Hb Constant Spring, the severity of anemia
non-deletional alpha thalessemia due to abn elongation/instability of the alpha chain, more sever than other alpha that variants
alpha thal trait ( ), ( ); symptoms
(–,a), (–,a)
mild microcytic anemia
alpha thal carrier ( ), ( ); symptoms
(–, a), (a,a)
Slightly low MCV and MCH
beta thal minor or trait ( ), ( )
b/b+ or b0/b
Only one gene has a mutation
Microcytic anemia, HgA2>3.5
beta thal intermedia ( ), ( ); symptoms
Beta intermedia is b+/b+ or b0/b+
Microcytic anemia, variable levels, occasional transfusion
beta thal major ( ), ( ); symptoms
Transfusion dependent
Severe anemia, microcytosis, high output heart failure, bone abnormalities, HSM, renal enlargement, iron overload
MOA of luspatercept
inhibits TGFbeta which increases differentiation and proliferation of erythroid precursors
Hb Lepore
two normal alpha chains and two delta fusion chains due to gene cross over. Functional hgb that moves like HgS on electrophoresis.
Hets are like beta that minor, homozygotes with more severe beta that major phenotype
South asian ovalocytosis mutation and inheritance, smear
misfolding of band 3, AD, oval shaped RBC with hemolytic anemia
abetalipoproteinemia symptoms and smear
cannot absorb fat; steatorrhea, retinitis pigmentosa, neurologic deficits, FTT; vitamin E deficiency causes acanthocytes
sideroblastic anemia, congenital; mutation and treatment
ALAS2 deficiency, poor heme synthesis with iron deposition in mitochondria, treat with high doses of vitamin B6
smear with massive basophilic stippling and hemolytic anemia
hereditary pyrimidine-5-nucleosidease deficiency
Osler-webber-rendu findings and mutation
telangiectasias, epistaxis, AVMs, mutas in SMAD4, ACVRL1, ENG
reduced inhibitor development in hemophilia if this type of factor is used
plasma derrived with vwf rather than recomb,
when to test for VWF levels in woman
first 5 days of the menstrual cycle due to least estrogen effect
Heydes sydrome
acquired type IIA VWF from aortic stenosis shearing, AVM bleeding
emicizumab MOA and use
bridges IXa and X to restore function to VIII; only for prophylactic (with or without inhibitor) not for active bleeding
factor XIII deficiency lab pattern and role of this factor and treatment
elevation of both PT and PTT, stabilizes fibrin at the end of the cascade, treat with fibrogammin, cryo or ffp
young woman with thrombosis in common iliac vein and why
may-thurner syndrome, compression by R common iliac artery
axillary subclavian thrombosis in repetitive injury/activity
paget-schrooetter syndrome, thoracic outlet compression
OCPs and clots why
decreases antithrombin III, protein S, increases factor levels and platelet activity
patient with thrombosis with marfanoid appearance, seizures, myopia, iridonesis, subluxation of the lens, developmental delay and short stature; treatment
homocysteinuria, treat with B6
pancytopenia, macrocytosis, normal B12 but high homocysteine and MMA levels, name the disorder
transcobalmin II deficiency; cannot move B12 to cells
juvenille hemochromatosis age of onset, gene and inheritance
age <30, AR, HJV gene, severe clinical presentation
ferroportin mutation unique features in lab and biopsy, gene and inheritance
FPN-1 mutation, AD
cannot shuttle iron to cells which results in high ferritin but normal to reduced transferritin saturation and mild anemia
Liver biopsy with iron in kupffer cells rather than hepatocytes
TFR2 hemochromatosis, mechanism, severity, inheritance, age of onset
increased intestinal absorption, AR TFR2 mutation, young <30, less severe than HJV
cause of porphyria; treat porphyria and MOA
Cause is enzyme error in heme synthesis results in accumulation of toxic heme byproducts
hemin= suppresses ALAS synthesis to reduce ALA and PBG production
givosiran= siRNA against 5-aminovulinic acid synthase 1 to decrease ALA and PBG production accumulation
treatment for erythropoietic protoporphyria (EPP)
afamelanotide= alpha melanocyte stimulating hormone protects against oxidant damage to reduce skin rash and pain with sun exposure
disease with chronic blistering photosensitivity and associated causes, treatment
porphyria cutanea tarda due to familial UROD mutation, hepatitis C, hepatic iron overload in deficiency of uroporphyrinogen decarboxylase
-treat underlying disease, phlebotomy, hydroxychloroquine
what is hereditary aceruloplasminemia and what is diagnostic lab
ceruloplasmin defect which causes poor iron transportation
high ferritin but normal transferrin sat and has neurologic deficits
low serum copper, low serum iron, anemia
need iron chelation therapy
iron refractory iron deficiency anemia, labs, cause and treatment
impaired oral iron absorption and utilization due to mutations in TMPRSS6 genes
normal ferritin, low saturation, microcytic anemia
IV iron partial responses
atransferrinemia labs, cause, mutation, treatment
AR absence of transferrin, microcytic anemia with elevated ferritin but low transferrin levels, treated with FFP to replace the transferrin protein to allow iron to reach RBCs
iron chelation 3 drugs IV verus oral, which one in renal disease but can cause what concerning side effect
deferoxamine is IV, deferiprone and deferasirox are oral, deferiprone is used in renal disease but can cause agranulocytosis
inheritance and mutations that cause hereditary eliptocytosis
alpha-spectin, beta-spectin, band-3, protein 4.1, glycophorin C, autosomal dominant
inheritance and mutations that cause hereditary spherocytosis, helpful lab finding, diagnostic test
spectrin, ankyrin, band 3
elevated MCHC >36
osmotic fragility test, eosin-5-maleimide test
extreme microcytosis MCV 30-50 with severe neonatal jaundice
hereditary pyropoikilocytosis, most severe form of HE