Omental leiomyosarcoma with unusual giant cells in a Beagle dog — Short communication

Sasaki, Jun and Toyoshima, Megumi and Okamura, Yasuhiko and Goryo, Masanobu (2016) Omental leiomyosarcoma with unusual giant cells in a Beagle dog — Short communication. Acta Veterinaria Hungarica, 64 (2). pp. 222-228. ISSN 0236-6290

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Abstract

A 10-year-old castrated male Beagle dog was presented with a 2-month history of intermittent vomiting and abdominal pain. The dog was referred to the Veterinary Teaching Hospital at Iwate University for further evaluation, and a splenic tumour was suspected on the basis of ultrasonography and computed tomography. Surgery identified a large, solid, light-pink mass on the greater omentum with blood-coloured ascites in the abdominal cavity, and resection was performed. Microscopically, the mass comprised spindle-shaped tumour cells and scattered osteoclast-like giant cells. Most spindle-shaped cells were positive for vimentin, desmin, and smooth muscle actin (α-SMA), whereas osteoclast-like giant cells were positive only for vimentin. On the basis of histopathological and immunohistochemical findings, a diagnosis of leiomyosarcoma was made. To the best of our knowledge, this represents the first report of leiomyosarcoma associated with osteoclast-like giant cells developing from the greater omentum in a dog.

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