Wednesday, August 26, 2009

32 - Idiopathic Thrombocytopenic Purpura ( ITP ) Mcqs part 2

11q: In adolescents with new onset ITP , an antinuclear antibody test should be done to evaluate for ?
a. HIV
b. SLE
c. Kawasaki disease
d. Evan’s syndrome


12q: What is the test to be done in an ITP patient with unexplained anemia to rule out Evan’s syndrome?
a. ELISA
b. Coomb’s test
c. Blood smear
d. Bone marrow aspiration


13q: Differential diagnosis of ITP are ?
a. Exposure to medication that induces drug-dependent antibodies
b. Splenic sequestration due to previously unappreciated portal hypertension
c. Early aplastic processes such as fanconi anemia
d. Amegakaryocytic thrombocytopenia
e. Thrombocytopenia-absent radius ( TAR ) syndrome
f. All the above


14q: What is the disease that should be considered in young males found to have low platelet counts , particularly if there is a history of eczema and recurrent infection ?
a. SLE
b. HIV
c. Wiskott-aldrich syndrome
d. Hemolytic uremic syndrome


15q: All are true regarding the treatment of ITP except ?
a. There is no data showing that treatment affects either short- or long-term clinical outcome of ITP
b. Compared with untreated control subjects , treatment appears to be capable of inducing a more rapid rise in platelet count to the theoretically safe level of greater than 2 lakh/ cubic mm
c. Platelet transfusion in ITP is usually contraindicated unless life threatening bleeding is present
d. There is enough data to show that early therapy prevents intracranial hemorrhage


16q: What is the best treatment for a case of ITP with minimal, mild or moderate symptoms ?
a. No therapy other than education and counselling of the family and patient
b. Intravenous immunoglobulin ( IVIG ) at a dose of 0.8-1.0 g/kg/day for 1-2 days
c. Intravenous anti-D therapy at a dose of 50-75 micrograms/kg
d. Prednisone at a dose of 1-4 mg/kg/24 hr


17q: What is the dose of IVIG given to a patient of ITP that induces a rapid rise in platelet count ( usually greater than 2 lakh/cubic mm ) in 95 % of patients with 48 hrs ?
a. 0.8-1.0 g/kg/day for 1-2 days
b. 1.0-1.5 g/kg/ day for 1-2 days
c. 0.8-1.0 g/kg/day for 4 days
d. 1.0-1.5 g/kg/day for 4 days


18q: The role of splenectomy in ITP should be reserved for which of the following circumstances ?
a. The older child ( greater than or equal to 4 years of age ) with severe ITP that has lasted greater than 1 year ( chronic ITP ) and whose symptoms are not easily controlled with therapy
b. When life threatening hemorrhage ( intracranial hemorrhage ) complicated acute ITP, if the platelet count cannot be corrected rapidly with transfusion of platelets and administration of IVIG and corticosteroids
c. Both of the above
d. none of the above


19q: In ITP , which is the primary site of both antiplatelet antibody synthesis and platelet destruction ?
a. Liver
b. Spleen
c. Gall bladder
d. pancreas


20q: All of the following are true about chronic ITP except ?
a. Approximately 50 % of patients who present with acute ITP have persistent thrombocytopenia for greater than 6 months and are said to have chronic ITP
b. Splenectomy is successful in inducing complete remission in 64-88 % of children with chronic ITP
c. Before splenectomy the child should receive pneumococcal and meningococcal vaccines
d. After splenectomy the child should receive pencillin prophylaxis

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