Extramedullary plasmacytoma in the lung of a Doberman pinscher dog.

A 7-year-old Doberman pinscher dog was referred for evaluation of a radio-opaque thoracic mass. The left cranial lung lobe and associated mass were surgically resected and histopathology confirmed the presence of an extramedullary plasmacytoma (EMP). This is the first clinical description of an EMP in the lung of a veterinary patient.