title: Solitary extramedullary plasmacytoma in the retroperitoneum.
abstract: Solitary extramedullary plasmacytoma is an uncommon neoplasm and occurs most frequently in the upper respiratory tract. Herein, we reported a solitary extramedullary plasmacytoma in the retroperitoneum. A 28-year-old man presented with obstructive jaundice and a retroperitoneal tumor. Ultrasound-guided biopsy confirmed that the lesion was a plasma cell neoplasm. A detailed investigation showed that no other sites were involved. The tumor got a moderate reduction following local irradiation, and a complete remission was achieved after 12 courses of adjuvant chemotherapy. Therefore, the possibility of a solitary extramedullary plasmacytoma should be considered in the differential diagnosis of obstructive jaundice without a history of multiple myeloma.
authors.affiliation: Department of Pathology, Chang Gung Memorial Hospital, Tao Yuan, Taiwan, Republic of China.
authors.forename: T C
authors.initials: TC
authors.lastname: Chen
authors.forename: J H
authors.initials: JH
authors.lastname: Wu
authors.forename: K F
authors.initials: KF
authors.lastname: Ng
authors.forename: J M
authors.initials: JM
authors.lastname: Lien
authors.forename: C F
authors.initials: CF
authors.lastname: Hung
mesh_terms: D000328:Adult; D001651:Cholestasis, Extrahepatic / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D010954:Plasmacytoma / Q000175:diagnosis*; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*; D013927:Thrombosis / Q000175:diagnosis; D014682:Vena Cava, Inferior