Sequential magnetic resonance imaging of an intracranial hematoma in a dog.
An 8-year-old Yorkshire terrier developed acute onset coma and seizure after cranial trauma. Intracranial hemorrhage was suspected from the clinical signs and history. Low-field magnetic resonance (MR) imaging revealed a round mass within the right cerebral hemisphere, compressing the right lateral ventricle and displacing the longitudinal fissure to the left. The lesion was hypointense on T1-weighted images and hyperintense on T2-weighted images, consistent with an acute hemorrhage. MR imaging was performed every 24 h for 6 days from 1 h after the injury, and then on day 14 of hospitalization. With time, the signal intensity changed to hyperintense on Ti-weighted images. On T2-weighted images the center of the mass changed to hypointense, and then to hyperintense with a hypointense rim. These changes of signal intensity were related to hemoglobin oxidation.
Tamura Animal Clinic, 7-16 Yoshimien, Sacki-ku, Hiroshima Pre. 731-5132, Japan. cqx03426@ms8.megaegg.ne.jp
Shinji
S
Tamura
Yumiko
Y
Tamura
Takeshi
T
Tsuka
Kazuyuki
K
Uchida
D000818:Animals; D020202:Cerebral Hemorrhage, Traumatic / Q000150:complications / Q000473:pathology / Q000662:veterinary*; D003128:Coma / Q000209:etiology / Q000662:veterinary; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000473:pathology*; D004285:Dogs; D005260:Female; D008279:Magnetic Resonance Imaging / Q000662:veterinary; D012640:Seizures / Q000209:etiology / Q000662:veterinary