Thrombocytopenia is seen in all except:

d. Leukemia

While thrombocytopenia can occur in leukemia, it is not universally present in all cases. In contrast, conditions like Henoch-Schönlein purpura (HSP), disseminated intravascular coagulation (DIC), and thrombotic thrombocytopenic purpura (TTP) commonly feature thrombocytopenia.