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Epithelioid hemangiosarcomas of the bovine urinary bladder: a histologic, immun...

Epithelioid hemangiosarcoma is a specific variant of hemangiosarcoma that has recently been recognized in domestic animals. These malignant vascular neoplasms histologically resemble, and may be mistaken for, carcinomas. Four epithelioid hemangiosarcomas in the urinary bladders of 4 cows with severe enzootic hematuria are described in the current study. Grossly, the vesicular mucosa of the urinary bladder of ea...

Kaposi-like vascular tumor of the urinary bladder in a cow.

Kaposiform hemangioendothelioma is a rare human vascular neoplasm. In veterinary medicine this tumor type was only recognized in the dog. Here we describe an unusual case arising in the urinary bladder of a Holstein-Friesian adult cow. Histologically the tumor presented a nodular proliferation of spindle cells, forming angular slits, often containing extravasated erythrocytes. Peripherically, well-formed vascul...

Decrease of E-cadherin expression in canine cutaneous histiocytoma appears to b...

Background: Canine cutaneous histiocytoma (CCH) is an epidermotropic tumour of Langerhans cells, most frequent in young dogs, which undergoes spontaneous regression. Materials and Methods: E-cadherin immunoexpression was analysed in ninety-three CCH, categorized according to Cockerell and Slauson (1976) criteria into four histological groups, representing different stages of tumour regression. Results: All tumo...

Invasive micropapillary mammary carcinoma in a male cat: first report.

Tumores mamários da cadela: estudo de factores biológicos (ciclooxigenases 1 e ...

Os tumores mamários são a neoplasia mais frequente que afecta cadelas adultas. O seu diagnóstico é dificultado pela grande diversidade a nível clínico e histológico. O comportamento tumoral é muitas vezes imprevisível, devido à não existência de um comportamento padrão, associado ao tipo histológico diagnosticado. Os estudos de prognóstico são importantes, pela necessidade em melhorar o conhecimento acerca do v...