颅内肉芽肿的影像诊断与误诊分析

Diagnostic Imaging Findings of Intracranial Granuloma and Misdiagnosis Analysing

目的 :探讨颅内肉芽肿的 CT、MRI表现并分析误诊原因。方法 :回顾性观察 16例颅内肉芽肿的 CT、MRI资料。结果 :颅内肉芽肿的影像表现 :1病灶小 ,呈结节状或厚壁小环状 ;2 CT平扫病灶呈等或略高密度 ,可伴有小点钙化 ,MRI平扫 T1 WI呈等信号 ,T2 WI呈高信号 ,增强可见早期强化或延迟性强化 ;3灶周水肿较轻 ;4无明显占位效应或伴有轻度脑萎缩。 11例影像诊断与临床相符 ,5例误诊。结论 :CT及 MRI对颅内肉芽肿的诊断有重要的临床意义。

Objective:To study CT and MRI findings of intracranial granuloma and analyse misdiagnosis.Method:CT and MRI data of 16 patients with incromial granuloma was studied retrospectively.Results:The following are imaging findings of intracranial granuloma: ①The focus is small and like a nodule or a ring with thick wall.②CT scan show focus of density or high density and can combine with small spots of calcification.MRI scanning show T_1WI signal,T_2WI show high signal.Enhancing shows early or delayed enhancement.③Slight edema were found in surrounding.④No obvious occupying was found and some cases has slight brain atrophy.The imaging diagnosis of 11 patients was matched with clinical diagnosis and 5 cases were misdiagnosed.Conclusion:CT and MRI had important clinical value in the diagnosis of intracranial granuloma.