Author(s): Watson AD, Young KM, Dubielzig RR, Biller DS. Primary mesenchymal or mixed-cell-origin lung tumors in four dogs. J Am Vet Med Assoc. 1993 Mar 15;202(6):968-70.
Journal: Journal Of The American Veterinary Medical Association, Volume 202, Issue 6, Mar 1993
Primary lung tumors of mesenchymal or mixed cell origin were diagnosed in 4 dogs with clinical and radiographic abnormalities indicating an intrathoracic mass. Each dog had 1 large intrapulmonary lesion, and 1 dog also had nodules scattered throughout all lung lobes. Two dogs were euthanatized; 1 had a biphasic pulmonary blastoma; and the other had a pulmonary chondroblastic osteosarcoma with intrapulmonary metastases. The masses in the other 2 dogs were hamartomas (lipomatous in 1, microcystic in the other), which were resected. Both dogs survived more than 1 year after surgery. Primary lung tumors are uncommon in dogs and are generally malignant (adenocarcinomas or carcinomas). Tumors of connective tissue or mixed cell origin are rare, but the outcome is potentially good after surgical removal.