Azizi, S., M. Amirmohammadi, R. Kheirandish, Z. Davoodian & M. Goodarzi, 2017.

Occurrence of haemangiosarcoma on the gingiva of a calf: a case report.

Bulg. J. Vet. Med., 20, No 2, 183–188.

Haemangiosarcoma is a malignant endothelial cell tumour with rapid growth and poor prognosis. In animals, haemangiosarcoma is frequently reported in dogs as a visceral tumour. The present study describes a gingival haemangiosarcoma in a 2-month-old, female native breed calf with a tumour like-mass on the gingiva. The owner had noticed the mass 2 weeks after birth due to salivation, bleeding and halitosis. It had rapid growth and caused anorexia and weight loss in the animal. Histopathologic examination showed a lot of thin-walled, irregular blood vessels lined by a single and less commonly two layers of endothelial cells. The lining cells were with spindle or ovoid shape with vesicular to hyperchromatic nuclei and prominent nucleoli. There were remarkable thrombi in some vessels. The reported lesions were diagnosed as haemangiosarcoma based on histopathologic characteristics such as irregular vascular canals and polymorphism of neoplastic endothelial cells. Haemangiosarcoma is rare in the oral cavity of cattle.

Key words: calf, haemangiosarcoma, histopathology