Journal of Veterinary Medical Science
Online ISSN : 1347-7439
Print ISSN : 0916-7250
Pathology
Kaposi-Like Vascular Tumor of the Urinary Bladder in a Cow
Isabel PIRESFelisbina Luisa QUEIROGAFilipe SILVACarlos PINTOCarlos LOPES
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Volume 71 (2009) Issue 6 Pages 831-833

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Abstract

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 vascular channels were seen. These cells were positive to vimentin and to factor VIII-related antigen by immunohistochemical stain. Based on its characteristics, it was classified as kaposiform hemangioendothelioma and as far as we know, it is the first case described in cattle.

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