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目的提高对跨中、后颅窝轴外肿瘤及肿瘤样病变的影像学认识。方法60例经病理证实的跨中、后颅窝轴外肿瘤及肿瘤样病变按位置分为中央型和外侧型，后者又分中颅窝型、后颅窝型及骑跨型，分析各型构成情况及影像学特征。结果中央型12例，脊索瘤5例，垂体瘤3例，鼻咽癌2例，颅咽管瘤、脑膜瘤各1例。外侧型48例，三叉神经肿瘤14例，脑膜瘤12例，表皮样囊肿11例，硬膜型海绵状血管瘤4例，皮样囊肿、转移瘤各2例，血管外皮瘤、颈静球脉瘤、鼻咽癌各1例。多数病变可根据影像学特点做出诊断并明确范围。结论按位置特征对跨中、后颅窝轴外肿瘤及肿瘤样病变分型，有助于定性诊断及范围描述，有较高的临床应用价值。
Objective To improve the imaging knowledge of tumors in the middle and posterior fossa and tumor-like lesions. Methods 60 cases of pathologically proven transmural and posterior fossa tumors and tumor-like lesions were divided into central and lateral according to the location, the latter sub-cranial fossa, posterior fossa and riding type, analysis of Type constitution and imaging features. Results There were 12 cases of central type, 5 cases of chordoma, 3 cases of pituitary tumor, 2 cases of nasopharyngeal carcinoma, 1 case of craniopharyngioma and meningioma. 48 cases of lateral type, 14 cases of trigeminal tumors, 12 cases of meningioma, 11 cases of epidermoid cysts, 4 cases of dural cavernous hemangioma, dermoid cysts, 2 cases of metastases, hemangiopericytoma, jugular bulb One case of tumor and one case of nasopharyngeal carcinoma. Most of the lesions can be based on imaging characteristics to make a diagnosis and a clear range. Conclusion According to the location characteristics of the mid and posterior fossa tumor and tumor-like lesions, contribute to the qualitative diagnosis and range description, a higher clinical value.