Two haemangioendotheliomas in a bovine brain

Area of Science:

• Veterinary Pathology
• Neoplastic Disease Research
• Animal Oncology

Background:

• Haemangioendothelioma is a rare vascular tumor.
• Brain tumors in young bovines are infrequently documented.
• Understanding novel tumor presentations is crucial for veterinary diagnostics.

Observation:

• A calf presented with an unusual brain neoplasm.
• Microscopic, ultrastructural, and immunohistochemical analyses were performed.
• The tumor displayed a significant proliferation of vasoformative elements.

Findings:

• Endothelial cells showed both epithelioid and spindle cell morphologies.
• A key characteristic was the formation of intracytoplasmic miniature lumens within endothelial cells.
• This unique feature aids in classifying this specific vascular neoplasm.

Implications:

• This case expands the known spectrum of haemangioendothelioma.
• It highlights the importance of detailed ultrastructural analysis in diagnosing rare veterinary tumors.
• Findings contribute to the differential diagnosis of brain lesions in cattle.