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Left ventricular mass in a Simmental calf: cavernous haemangioma.

Haemangiomas are benign tumours of the vascular endothelium (4–6). Most haemangiomas are well circumscribed and are com posed of variably sized vascular spaces. These spaces are filled with erythrocytes and are lined by a single layer of uniform endothelial cells. These tumours have been called cavernous or capillary tumours (5). Haemangiomas are common in older dogs but infrequently occur in other domestic animals (5). Haemangiomas can be seen in very young horses, usually on the distal limbs (4). They are most common in the dermis and subcutis, especially of the legs, flank, neck, face, and eyelids (5). This report describes a cavernous haemangioma in the left ventricle in a 5-day-old female Simmental calf.