a rare case of non-ossifying fibroma in a 32-year-old man: case report and review of literature

Background: non-ossifying fibroma is a benign fibrohistiocytic bone tumor and occurs mostly in the metaphysis of long bones. non-ossifying fibroma of the rib is extremely rare.case presentation: herein, a case of a 32-year-old man who was referred for a prolonged cough after an accident was presented. ct scan revealed a well-defined expansile lesion in the right 11th rib. due to the uncertainty of the diagnosis, a core needle biopsy was taken fromthe lesion. the biopsy showed proliferated bland fibroblasts admixed with multinucleated giant cells and hemosiderin deposition. based on the imaging findings and h&e studies, non-ossifying fibroma of the rib was confirmed.conclusion: although the most common sites of non-ossifying fibroma are metaphysis of long bones, they can occur in any bone. the diagnosis of non-ossifying fibroma is based on radiological findings, and the correct diagnosis in imaging studies reduces invasive procedures.