Sarcoidosis-Associated Immune Thrombocytopenic Purpura and Focal Segmental Glomerulosclerosis.

Sarcoidosis is well known for heterogeneity of its presentation and multisystem organ involvement. It commonly involves respiratory tract, skin, eyes, and lymph nodes, as well as hematologic and renal systems. While anemia and lymphopenia are the most common hematologic abnormalities seen in sarcoidosis, immune thrombocytopenic purpura (ITP) is considered rare. Renal abnormalities, although infrequent, are usually more likely to involve tubules rather than glomeruli. In this report, we present a case of sarcoidosis-associated ITP and focal segmental glomerulosclerosis (FSGS), refractory to first-line therapy, but successfully treated with Rituximab and thrombopoietin-receptor agonist.