Abstract:
Collagenous fibroma is a benign fibrous soft-tissue tumor that occurs predominantly in subcutaneous tissue or skeletal muscle and exhibits slow growth. Collagenous fibroma originating from the meninges is extremely rare. This case report describes the presentation of a 36-year-old female patient with meningeal collagenous fibroma. Non-contrast cranial CT revealed an isodense lesion, with no enhancement on contrast-enhanced scanning. MRI showed that the lesion demonstrated isointensity on both T1- and T2-weighted imaging (T1WI and T2WI, respectively), it manifested as hypointensity on diffusion-weighted imaging (DWI). In contrast-enhanced scanning, the lesion presented marked ring enhancement at the margin, and a dural tail sign was visible. Histopathological examination confirmed the lesion as collagenous fibroma.