Case Report: Clinical and magnetic resonance imaging findings in intracranial hemangiosarcoma in a cat

Hemangiosarcoma (HSA) is a highly malignant tumor of endothelial origin that is infrequently reported in cats, accounting for less than 2% of nonhematopoietic neoplasms. Feline HSA is typically classified into dermal and visceral subtypes, both of which exhibit metastatic potential. While HSA is the tumor most commonly reported to metastasize to the brain in dogs, intracranial involvement in cats remains rare, with only one previously documented metastatic case. This case report details the clinical presentation, magnetic resonance imaging (MRI) features, histopathological findings, and gross post-mortem brain changes in a cat diagnosed with intracranial hemangiosarcoma.