A 64-year-old man was referred to our hospital with progressive loss of function in his right upper and lower extremities. Unenhanced computed tomographic showed a high-density nodular lesion in the left basal ganglion with surrounding hypoattenuation. Brain magnetic resonance imaging demonstrated a predominantly cystic mass with multiple internal septa and an eccentric solid component showing enhancement. Histological examination revealed organizing blood clot and piloid gliosis. This unusual appearance of a mass-like organizing blood clot should be considered in the differential diagnosis when an encapsulated cystic mass with nodular component following the signal characteristics of old blood on MRI is encountered.

译文

:一名64岁男子因右上肢和下肢渐进性功能丧失而被转诊到我们医院。未增强的计算机体层摄影术显示左基底神经节有高密度的结节性病变,周围低衰减。脑磁共振成像显示主要是囊性肿块,内部有多个隔垫,偏心的固体成分增强。组织学检查显示有组织的血块和小胶质细胞胶质增生。当在MRI上遇到遵循旧血信号特征的具有结节性成分的囊状囊性肿块时,在鉴别诊断中应考虑这种类似肿块状组织血块的异常出现。

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