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报告了经手术与病理证实的42例髓母细胞瘤的CT表现,42例肿瘤均位于后颅窝,35例位于后颅窝中线小脑蚓部,7例位于偏侧。25例肿瘤呈卵圆形,9例呈圆形,3例有分叶,5例呈不规则形。35例肿瘤周围有狭窄之水肿带,肿瘤多边界清楚。3例肿瘤有斑片状钙化,4例有坏死囊变。肿瘤最大5×5×6cm,最小3×2×2cm。36例增强前CT均值为40.8Hu,范围28～50Hu,增强后平均为56.7Hu,范围50～84Hu。
The CT findings of 42 cases of medulloblastoma confirmed by surgery and pathology were reported. Forty-two tumors were located in the posterior fossa, 35 in the posterior fossa of the midline cerebellar vermis and 7 in the lateral. Twenty-five tumors were oval, 9 were round, 3 were lobulated, and 5 were irregular. 35 cases of tumor around the narrow edema, tumor clear boundary. 3 cases of tumor patchy calcification, 4 cases of necrotic cystic degeneration. The largest tumor 5 × 5 × 6cm, the smallest 3 × 2 × 2cm. The average CT value of the 36 cases before enhancement was 40.8Hu, ranging from 28 to 50Hu, with an average of 56.7Hu after enhancement, ranging from 50 to 84Hu.