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颞骨的恶性肿瘤发病率极低,仅为1/10万~6/10万,其中以外耳道最常见,中耳及内耳更为少见[1]。内淋巴囊肿瘤(endolymphatic sac tumor,ELST)是起源于内耳的低度恶性肿瘤,较为罕见,起病隐匿,生长缓慢。ELST位于部位较深的侧颅底,周围紧邻面神经、颈内动静脉等重要神经及血管,其后方为后颅窝。因此,尽管其恶性程度较低,但肿瘤常累及桥小脑角区,较大肿瘤延伸至颈静脉球部,侵蚀静脉窦及其相关血管等结构,手术难度较大[2-3]。笔者报道了1例经病理结果证实的ELST病例,通过患者的临床表现、实验室诊断、MRI与CT检查结果,并结合相关文献,总结了其影像学表现在诊断中的应用价值。
内淋巴囊肿瘤术后20年复发影像学诊断一例
A case of imaging diagnosis of 20-year recurrence of endolymphatic sac tumor
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摘要: 笔者报道了1例行次全切术后复发的内淋巴囊肿瘤病例,且初次诊断为乳头状汗腺瘤,分析其CT及MRI特点、临床表现和病理形态,并复习相关文献,重点总结其影像学表现,旨在提高影像医师及临床医师对该病的认识。Abstract: This paper reports a case of recurrent endolymphatic sac tumor after subtotal resection, which was initially diagnosed as papillary sweat adenoma. The CT and MRI characteristics, clinical manifestations and pathological morphology of the tumor were analyzed, and the relevant literature was reviewed. The imaging manifestations were mainly summarized in order to improve the understanding of the tumor by radiologists and clinicians.
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