Intracranial Interdural and Extradural Cerebellar Convexity Dermoid Cyst: A Case Report of Rare Tumor at the Rarest Location

Manish Kumar Mishra, Vikrant Yadav, Ravi Shekhar Pradhan, Ravi Shankar Prasad
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Abstract

Abstract Intracranial dermoid cysts are rare dysembryonic tumors of benign nature. These are uncommon in adults. If present, they are usually located in the midline or along the lines of embryonic fusion. The posterior fossa region is an infrequent site. Extradural or interdural locations are even more rare. In this case report, the authors report a laterally located large posterior fossa right cerebellar convexity interdural and extradural dermoid cyst over the sigmoid sinus. It was managed by totally extradural maximum possible safe decompression with microneurosurgical technique. The authors share their experience of addressing this rare pathology at the rarest location with unusual imaging findings.
颅内硬膜间及硬膜外小脑凸皮样囊肿:罕见部位罕见肿瘤1例
摘要颅内皮样囊肿是一种罕见的良性胚胎异常肿瘤。这在成人中并不常见。如果存在,它们通常位于胚胎融合的中线或沿线。后窝区域是一个少见的部位。硬膜外或硬膜间的位置更罕见。在这个病例报告中,作者报告了一个位于乙状窦上方的大后窝右侧小脑凸硬膜间和硬膜外皮样囊肿。采用显微神经外科技术进行全硬膜外最大可能安全减压。作者分享他们的经验,解决这种罕见的病理在最罕见的位置与不寻常的影像学发现。
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