Kaplan Heme/Lymph 1 Flashcards
2/27 test: #1-33 3/12 test: #34-
What condition are Birbeck granules associated with?
Langerhans cell histiocytosis (Histiocytosis X)
What cancer is Philidelphia chromosome associated with?
Chronic myeloid leukemia (and occassionally acute lymphocytic leukemia
what molecular marker is used to diagnose hairy cell leukemia?
tartrate-resistant acid phosphatase
what hematologic disorder is associated with elevate leukocyte alkaline phosphatase
myeloid metaplasia
explain the ristocetin test
ristocetin will only cause platelet agglutination in the presence of vWF so if you add it to blood and no agglutination occurs you can diagnose a deficiency of vWF
why is desmopressin an effective treatment for vWF disease?
desmopressin triggers release of vWF from Weibel-Palade bodies of endothelial cells
what do Reed Sternberg cells look like on histology and what disease are they associated with
“owl-eye”, bilobed “mirror-image” nucleus which may have a large nucleolus and clear halo around it
Hodgkin’s Lymphoma
what component of the eosinophilic granules of an esosinophil is involved in parasite destruction
major basic protein
what is chromium-51 used for
to measure RBC survival
what processes are evidenced by decreased ESR
slower sedimentation and settling suggests sickle cell anemia (due to abnormal shape), polycythemia (many cells), CHF (mechanism unknown)
what kind of pathogens would elicit a high neutrophil count on the CBC differential
extracellular bacteria and parasites
what kind of pathogens would elicit a Th1 response
intracellular bacteria and viruses
A patient presenting with headaches and fatigue who has a past medical history of alcohol abuse and nodular liver on X-ray is shown to have 68% Hct and reticulocytosis as well as nucleated red cells. What’s the likely diagnosis?
hepatocellular carcinoma
what does DIC do to fibrin degredation products, PT, PTT and bleeding time
increases FDP (low platelets due to coagulation), increases PT, increases PTT and increases bleeding time
what do ITP, TTP and HUS do to PT and PTT
nothing;
bleeding time is increased and platelet count decreased, but nothing happens to PT and PTT since coag factors aren’t involved