Yinghao Gu

Abstract Background: Intracranial solitary fibrous tumor (SFT) is a rare mesenchymal neoplasm. Malignant progression of low-grade SFT typically occurs over an extended time course and in the context of TERT promoter mutations. Rapid progression with marked proliferative escalation following a previously reported TERT-wild-type primary tumor is exceptionally rare. Case presentation: A 70-year-old male had undergone resection of an anterior skull base lesion at an outside hospital 12 months prior.

Abstract Intracranial epidermoid cysts are not true neoplasms; rather, they represent congenital benign lesions characterized by the presence of stratified squamous epithelium, commonly referred to as pearl tumors or cholesteatomas. These cysts exhibit slow growth within the cranial cavity, primarily manifesting as compressive changes and rarely inducing adjacent hyperostosis.