{Reference Type}: Case Reports {Title}: Non-ossifying Fibroma of Mandible in a Four-Year-Old Girl: A Case Report. {Author}: Khandaitkar S;Lamba G;Kolte V;Shenoi R;Shukla D; {Journal}: Cureus {Volume}: 15 {Issue}: 3 {Year}: 2023 Mar 暂无{DOI}: 10.7759/cureus.36470 {Abstract}: Non-ossifying fibroma (NOF) is not prevelant in the mandible. It appears mostly in the long tubular bones in children and adolescents. We are presenting a case of a four-year-old girl reported to the maxillofacial department with painless swelling over the lower right side of the jaw. On the orthopantomogram (OPG), a well-defined multilocular radiolucency with a sclerotic margin was present. On computed tomography (CT), an expansile lytic lesion with cortical thinning without a breach in cortical continuity was noted. By correlating clinical and radiological features, a diagnosis of odontogenic and/or osteogenic lesion was made. The patient was considered for an excisional biopsy with curettage. On histopathology, NOF was confirmed. On postoperative follow-up, there was no sign of recurrence, and bone regeneration was significant.