EXTRAMEDULLARY PLASMACYTOMAS IN DOGS - RESULTS OF SURGICAL EXCISION IN 131 CASES

One hundred thirty-six cases of extramedullary plasmacytoma (EMP) in 1 31 dogs were reviewed retrospectively. All tumors were treated initial ly by surgical excision. Histological diagnoses were made on the basis of light microscopy. Tumors occurred most frequently in middle-age to older dogs with a slight male predisposition. They were found to occu r anywhere on the exterior of the body and within the oral cavity. Thi s tumor appeared to be a distinct entity unrelated to multiple myeloma . Systemic disease was not documented in any of the dogs. In the major ity of cases, EMP behaved as a benign neoplasm that was cured by surgi cal excision.