Acute-on-chronic subdural cranial hematoma in a dog: case report

ABSTRACT A ten-month-old male Yorkshire terrier dog was evaluated via CT four months after traumatic brain injury. The head CT scan showed dilated ventricles associated with a peripheral crescent-shaped collection of blood near the right parietal bone with a mineralized area. The visceral layer of the hematoma was hyperattenuating on the native scan and showed moderate contrast enhancement after administration of intravenous iodinated contrast medium. No fractures were identified in the calvarium. These findings were compatible with acute-on-chronic calcified subdural hematoma, which have been described with more detail in humans. This is the first report to include the description of the imaging findings related to this condition using computed tomography in a dog.

摘要 本研究对一只10月龄雄性约克夏㹴于创伤性脑损伤4个月后行计算机断层扫描（Computed Tomography，CT）评估。头部CT扫描显示脑室扩张，右侧顶骨附近可见新月形外周血液积聚区，伴钙化区域。血肿的脏层在平扫图像上呈高密度，经静脉注射碘化对比剂后呈现中度强化。未发现颅骨骨折。上述表现符合慢性基础上急性发作的钙化性硬膜下血肿，此类病变在人类中已有更为详细的报道。本研究为首例针对犬类该病症的计算机断层扫描影像学表现的报道。