<prompt> All the following conditions cause thrombocytopenia exceptGiant hemangiomaInfectious mononucleosisHIV infectionIron deficiency anemia  <response>: Ans. d Iron deficiency anemiaRef: Robbins 9thpg 657-658; 8thpg 667-668; Wintrobes 12thpg 1595Thrombocytopenia refers to platelet count 1.5laccummQRefer to pretext of this chapter for important causes of ThrombocytopeniaThrombocytopenia is seen in 50 of patients with Infectious MononucleosisThrombocytosis is seen in Iron deficiency Anemia, platelet counts rise to twice the normal value and return to normal with Iron therapy. Exact cause unknown, but probably due to level of Erythropoietin 