[Castleman's disease associated rheumatoid arthritis recurring 20 years after removal]

A 40-year-old female associated with Rheumatoid Arthritis was treated by extirpation of the mediastinal tumor. Histological examination of the tumor revealed Castleman's disease of Hyaline-Vascular type and histology of the dissected mediastinal lymphnodes was the same appearance as tumor. The present case is unusual in that the tumor recurred in the same site 20 years after removal. The complete removal of tumor with dissection of lymphnodes surrounding tumor is important for the treatment of surgery. The present case is the 1st to be reported in Japan.