An uncommon localization of deep benign fibrous histiocytoma in the thigh: A case report.

Benign fibrous histiocytoma (BFH) is a rare mesenchymal tumor, with its deep variant (DBFH) accounting for only 1%-2% of cases. DBFH typically arises in the limbs, head, and neck, and usually measures under 12 cm. MRI can suggest the diagnosis by detailing the tumor's location and internal features. However, histopathological examination remains essential for definitive diagnosis, supported by immunohistochemical staining. The treatment is always surgical, involving complete resection of the tumor with clean excision margins.