颅内混合瘤的CT、MRI诊断(附七例报告)

目的提高对颅内混合瘤影像学表现的认识，丰富诊断学知识。材料与方法７例颅内混合瘤均经手术病理证实，其中脑膜瘤和胶质母细胞瘤的混合瘤２例，脑膜瘤和垂体瘤的混合瘤２例，多形性胶质母细胞瘤和血管母细胞瘤的混合瘤１例，胆脂瘤和黑色素瘤的混合瘤１例，垂体瘤和脑膜瘤的混合瘤１例。回顾性分析此７例混合瘤的ＣＴ、ＭＲＩ表现。结果颅内混合瘤的ＣＴ、ＭＲＩ表现酷似脑膜瘤、胶质瘤和垂体瘤等，不熟悉此类肿瘤的临床和病理知识，可错诊为常见肿瘤。对照临床和手术病理改变，可发现有４例混合瘤的ＣＴ、ＭＲＩ显示在同一部位的同一肿瘤有两种肿瘤表现特点。结论颅内混合瘤无特征性ＣＴ、ＭＲＩ表现，对于酷似脑膜瘤、胶质瘤和垂体瘤等，高度可疑混合瘤者，应结合临床考虑诊断。

Diagnosis of intracranial mixed tumor with CT and MRI: report of 7 cases

Purpose To recognize the images of intracranial mixed tumor. Materials and me thods Seven cases were studied with CT and MRI. All were proved by pathology, including mixed tumor of meningioma with glioblastoma 2 cases, meningioma with pituitary tumor 2 cases, glioblastoma multiform with angioblastoma 1 case, cholesteatoma with melanoma 1 case, and pituitary tumor with meningioma 1 case. We analysed the CT and MRI manifestations of intracranial mixed tumor retrospectively. Results The CT and MRI manifestations of intracranial mixed tumor were exactly like meningioma, glioma, and hypophysoma, etc, therefore it was usually misdiagnosed the common tumor. Four cases intracranial mixed tumor displayed two kinds of characteristic CT and MRI manifestation on the same region of the same tumor in contrast with the clinic and pathologic change. Conclusion There were no characteristic CT and MRI manifestations; the diagnosis should be made in combination with clinical information.