原发颅内淋巴瘤的CT与MRI诊断

目的:分析原发性颅内淋巴瘤的CT及MRI表现,提高对此病的认识。方法:对13例经手术病理证实的颅内原发性淋巴瘤的CT、MRI影像表现进行分析。结果:病灶单发或多发,肿瘤常位于脑表面或中线附近。CT平扫呈等或稍高密度影,边界较清。MRIT1呈稍低或低信号T2呈等或高信号。肿瘤占位效应轻,增强多呈“团块状”或“握拳状”强化。结论:原发性颅内淋巴瘤的CT及MRI表现有一定的特点,但缺乏特征性须与某些其他颅内病变鉴别,以减少误诊。

CT and MRI Diagnosis of Primary Malignant Lymphoma in Brain

Objective To analyse CT and MRI appearances of primary malignant lymphomas in brain in order to improve its diagnosis.Methods The CT and MRI appearances of 13 patients with primary malignant lymphoma in the brain proved by operation,pathology or biopsy.wereretrospectively analysed.Results The single or muctiple tumors were seen in the surface or middle line of cerebrum.The lesions were iso-indensity or hyper-indensity by CT plan scan.The lesions were iso-intense or slightly hypo-intense on T_1 weighted image while iso-intense or hyper-intense on T_2 weighted image by MRI plan scan.Homogenous enhancement presented in most cases,just like “closed fist” or “clump” in most tumors.Most tumors showed minimal or moderate edema and mass space effect.Conclusion The CT and MRI appearances of primary malignant lymphoma in the brain have some features.but lack of characteristics.It is nessary to be identified with some other mass lesions.In order to decrease mistaken diagnosis.