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目的 :分析枕大池发育异常的影像学表现 ,加深对本病的认识。方法 :本组 40例中男 2 2例 ,女 18例。年龄 19～ 6 2岁 ,平均 41岁。 40例均先做CT平扫 ,其中 5例又行强化扫描 ,35例行脑池造影CT扫描 ;2 5例复查时又做MR检查。对CT、MRI表现进行回顾性分析。结果 :按病变形态、范围与影像学表现分为二型 :①对称型 ;②非对称型。其表现各具特点。结论 :根据发病部位与影像学表现诊断不难 ,但应与幕下某些低密度病变进行鉴别。脑池造影CT扫描有助确诊。
Objective: To analyze the imaging manifestations of dysplastic development of occipital cistern and deepen the understanding of this disease. Methods: The group of 40 patients, 22 males and 18 females. Age 19 ~ 6 2 years old, average 41 years old. All 40 cases underwent CT scan first, of which 5 cases underwent enhanced scan and 35 cases underwent brain CT scan. Another 25 cases underwent MR scan. The CT and MRI findings were retrospectively analyzed. Results: According to the lesion morphology, extent and imaging findings were divided into two types: ① symmetrical; ② asymmetric. Its performance has its own characteristics. Conclusion: It is not difficult to diagnose the disease site and imaging findings, but some low-density lesions should be identified. Cerebral CT angiography scan is helpful.