title: Biclonal extramedullary plasmacytoma arising in the peritoneal cavity: report of a case.
abstract: We report a rare case of extramedullary plasmacytoma, which arose either in the ileum or the ileal mesentery. A 70-year-old woman presented with a high fever and symptoms of bowel obstruction. Computed tomography and magnetic resonance imaging showed a large heterogeneous tumor in the peritoneal cavity. Serum immunoelectrophoresis revealed a biclonal increase of IgA-Kappa and IgG-Kappa. At surgery, we found that the parenchyma of the fragile tumor had firm communication with the ileal mesentery, and the cavity of the tumor communicated with the ileal lumen. After a temporary regression following surgery and chemotherapy, the tumor grew rapidly. Although there was no evidence of progression to multiple myeloma, the patient died of cachexia less than 4 months after surgery.
authors.affiliation: Department of Surgery, Omiya Medical Center, Jichi Medical School, Saitama, Japan.
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Yoshida
authors.forename: Kuniyasu
authors.initials: K
authors.lastname: Soda
authors.forename: Shigeki
authors.initials: S
authors.lastname: Yamada
authors.forename: Moriyasu
authors.initials: M
authors.lastname: Nakahara
authors.forename: Junji
authors.initials: J
authors.lastname: Nishida
authors.forename: Minako
authors.initials: M
authors.lastname: Kametaka
authors.forename: Fumio
authors.initials: F
authors.lastname: Konishi
mesh_terms: D000368:Aged; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D007078:Ileal Neoplasms / Q000175:diagnosis*; D007122:Immunoelectrophoresis; D007070:Immunoglobulin A / Q000097:blood; D007074:Immunoglobulin G / Q000097:blood; D008279:Magnetic Resonance Imaging; D010954:Plasmacytoma / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed
chemical_list: D007070:Immunoglobulin A; D007074:Immunoglobulin G