This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Thrombocytopenia is caused by:a) Heparinb) Acyclovirc) DICd) Henoch-schonlein purpura (HSP)e) Hemolytic uremic syndrome (HUS) 
Select and explain. 
A. acd, B. ace, C. cde, D. ade
B: ace
Answer: B: ace 
Explanation: DIC and HUS cause megakaryocytic thrombocytopenia
DIC and microangiopathic hemolytic anemia cause thrombocytopenia.
Kasabach-Merritt syndrome (KMS) is defined as profound thrombocytopenia related to platelet tapping within a vascular tumor.
Spleenomegaly (hyperspleenism) may cause thrombocytopenia.
Shaken baby syndrome is not a cause of thrombocytopenia 
	 
Important drugs causing thrombocytopenia
Quinine        o Vancomycin o Sulfa compounds
Quinidine    o Heparin        o Gold salts