囊性少突胶质细胞瘤MRI表现

目的 探讨囊性少突胶质细胞瘤的MRI表现。方法 回顾性分析经手术病理证实的10例囊性少突胶质细胞瘤的MRI表现。结果 10例中，8例病灶位于幕上，2例病灶位于幕下小脑蚓部；9例为单发病灶，仅1例为多发病灶；完全囊性病变4例，大囊伴类结节病变3例，多房囊性病变3例；7例病灶囊壁光滑、规则，3例囊壁局部凹陷、毛糙。3例病灶可见钙化。9例轻度瘤周水肿，1例中、重度水肿。增强后3例病灶实性成分明显强化，3例病灶囊壁呈明显环形强化，1例囊壁呈局灶性强化。结论 COD术前准确诊断较难，其MRI表现具有一定特点。对发生于幕上表浅部位、完全囊性或伴有结节和/或分隔的大囊性病变，应考虑到本病可能。

MRI manifestations of cystic oligodendrocytoma

Objective To investigate MRI features of cystic oligodendrocytoma. Methods MRI features of 10 patients with oligodendroglial tumors proved with operation and pathology were analyzed retrospectively. Results Among 10 patients, lesionslocated on the supratentorium in 8 patients, while on the cerebellar vermis in 2 patients. Solitary lesion was found in 9 cases, and multiple lesions were found in 1 case. Complete cystic lesions were observed in 4 cases, large cystic lesions with solid nodules were found in 3 cases, and multi-cystic lesions were found in 3 cases. Smooth cyst wall of lesions were found in 7 cases, locally depressed and rough wall were found in 3 cases. Calcifications were found in 3 cases. Mild peritumoral edema was found in 9 cases, moderate to severe edema was found in 1 case. The lesions significantly enhanced in 3 cases, ring enhanced in 3 cases, and locally enhanced in 1 case. Conclusion COD is difficult to diagnose, but has certain MRI characteristics. COD should be considered when supratentorial complete cystic lesion or large cystic lesion with septum and/or solid nodule was found with MRI.