SOLITARY EXTRAMEDULLARY PLASMACYTOMA IN THE RETROPERITONEUM

Solitary extramedullary plasmacytoma is an uncommon neoplasm and occur s most frequently in the upper respiratory tract. Herein, we reported a solitary extramedullary plasmacytoma in the retroperitoneum, A 28-ye ar-old man presented with obstructive jaundice and a retroperitoneal t umor. Ultrasound-guided biopsy confirmed that the lesion was a plasma cell neoplasm, A detailed investigation showed that no other sites wer e involved. The tumor got a moderate reduction following local irradia tion, and a complete remission was achieved after 12 courses of adjuva nt chemotherapy, Therefore, the possibility of a solitary extramedulla ry plasmacytoma should be considered in the differential diagnosis of obstructive jaundice without a history of multiple myeloma, Am. J, Hem atol, 58:235-238, 1998. (C) 1998 Wiley-Liss, Inc.