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: Medicine
False statement regarding DIC is: March 2011 
Select and explain. 
A. Thrombocytopenia, B. Decreased fibrinogen, C. Decreased PTT, D. Increased PT
C: Decreased PTT
Answer: C: Decreased PTT 
Explanation: Ans. C: Decreased PTT In DIC, clotting factors and platelets are consumed resulting in thrombocytopenia, prolonged PT and APTT. In addition, there is evidence of active coagulation with consumption of fibrinogen and generation of fibrin degradation products (D-dimers) Diagnosis of Severe cases with hemorrhage: The PT and APTT are usually very prolonged and the fibrinogen level markedly reduced. High levels of fibrin degradation products, including D-dimer, are found owing to the intense fibrinolytic activity stimulated by the presence of fibrin in the circulation. There is severe thrombocytopenia. The blood film may show fragmented red blood cells (schistocytes). Diagnosis of Mild cases without bleeding: There is increased synthesis of coagulation factors and platelets. PT, APTT, and platelet counts are normal. fibrin degradation products are raised. Definitive diagnosis depends on the result of: Thrombocytopenia Prolongation of prothrombin time and aPTT A low fibrinogen concentration Increased levels of FDP