MAGNETIC RESONANCE IMAGING APPEARANCE OF INTRACRANIAL HEMORRHAGE SECONDARY TO CEREBRAL VASCULAR MALFORMATION IN A DOG

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Abstract
A 14‐year‐old dog developed an acute onset of depression, disorientation, left hemiparesis, left hemianopia, left facial hypoesthesia, and a tendency to turn to the right. Based on these findings, a lesion affecting the right forebrain was suspected. Magnetic resonance imaging showed a mass within the right cerebral hemisphere resulting in compression of the right lateral ventricle and shifting the longitudinal fissure to the left. The lesion was hyperintense on T1‐weighted images and hyperintense with focal regions of hypointensity on proton density‐, and T2‐weighted images, consistent with a subacute hemorrhage. At necropsy, there was a hematoma in the parietal portion of the right cerebral hemisphere. The hemorrhage was surrounded by numerous thin‐walled veins, most likely a venous malformation. Magnetic resonance imaging of intracranial hemorrhage is reviewed.