Case report: acute polymyositis in a patient with chronic graft vs. host disease.

Chronic graft versus host disease (cGVHD) is a multisystemic condition which occurs in 25 to 40% of patients undergoing allogeneic bone marrow transplantation. A 31 year old male developed acute polymyositis one year in the setting of cGVHD etc. after allogeneic bone marrow transplantation. A viral etiology could not be proven. This presumably represented a manifestation of cGVHD. His clinical condition improved with immunosuppression and he remains asymptomatic, off therapy.