Immune Thrombocytopenic Purpura Secondary to Sarcoidosis.

Sarcoidosis is a systemic granulomatous disease involving multiple organs with predominantly pulmonary manifestations. Severe thrombocytopenia is a relatively rare hematologic manifestation of sarcoidosis. Immune thrombocytopenia is usually characterized by excessive antibody production leading to platelet destruction. There are a few reported cases of immune thrombocytopenic purpura secondary to sarcoidosis, but the pathophysiologic mechanism remains unknown. We report the case of a 65-year-old woman who presented severe thrombocytopenia and was found to have immune thrombocytopenic purpura secondary to sarcoidosis.