脑多发性结核瘤的MRI诊断

目的：分析脑内多发性结核瘤的MRI表现。方法：回顾性分析11例经手术、病理或临床随访证实为脑多发性结核瘤的MRI表现。MRI采用T1flair、FrfseT2WI、T2flair及Gd-DTPA增强T1WI检查。结果：病灶绝大多数位于灰白质交界区及基底节区,未成熟结核结节呈长T1长T2信号,灶周水肿明显,结节状强化;成熟结核结节呈典型“环靶征”,灶周水肿较轻,环形强化。T2flair和增强扫描病灶显示较佳。结论：脑多发性结核瘤是颅内结核的一种特殊表现,MRI表现具有特征性。

MRI diagnosis of multiple cerebral tuberculomas

Objective：To study the MRI features of multiple brain tuberculomas.Methods： 11 patients with clinically and pathological proved multiple cerebral tuberculomas were studied retrospectively. All patients underwent MRI with T1flair, FrfseT2Wl, T2flair and Gd- DTPA enhanced T1WI. Results：The majority of the lesions located in either the boundary of gray matter and white matter or basal ganglia. Immature tubereulomas showed hypointensity signal on T1WI and hyperintensity signal on T2WI, and nodular enlmneement after contrast injection, and were surrounded by obvious edema tissue. Mature tuberculomas showed typical target sign on T2WI, and were surrounded by slight edema tissue and showed nodular or annular eulmneement. T2flair and Gd-DTPA enhanced T1WI showed the lesions more dearly than the other sequences. Conclusion：The multiple cerebral tnhereulomas is a special pattern of the intraeranlal tubereulosis, and its MRI features are characteristic.