颅内卵黄囊瘤的MRI特征分析

Analysis to MRI Features of Intracranial Yolk Sac Tumour

目的探讨颅内卵黄囊瘤的MRI特征表现。方法回顾性分析经病理证实的4例颅内卵黄囊瘤的临床、病理及影像学资料。结果 4例卵黄囊瘤中实性病变1例,囊实性病变3例,实性病变部分T1WI呈低或稍高信号,T2WI呈稍高信号,DWI弥散轻度受限,ADC图呈低或稍低信号;增强扫描3例均呈明显不均匀强化。结论颅内卵黄囊瘤的MRI表现有一定特征,MRI有助于该病的诊断、鉴别诊断及治疗方案的制定。

Objective To investigate MRI features of intracranial yolk sac tumour. Methods 4 patients with intracranial yolk sac tumour proved by histology were retrospectively reviewed. The clinical,pathological and radiological data were analyzed. Results Among 4 patients with intracranial yolk sac tumour,solid mass existed in 1 patient,cystic and solid mass existed in 3 patients. The solid part of tumors showed hypointensity or slight hyperintensity on T1 WI,slight hyperintensity on T2 WI,mild restricted diffusion on DWI and ADC map showed low or slight low signal. After injection of contrast agent,tumors showed inhomogeneous enhancement. Conclusion MRI features of intracranial yolk sac tumour had certain characteristics,which is helpful for diagnosis,differential diagnosis and guiding treatment plan.