Desmoplastic Fibroma is a rare Mandibular tumour, only a few cases have been reported in the literature. It is a locally aggressive tumour with a high rate of local recurrence if not completely excised. A 21 yr old male consulted our department with a six month history of slowly growing swelling left mandible. He also had a complaint of complete numbness of the left lower lip and chin. He had a large radiolucent lesion on the left angle and ramus of the mandible measuring 100x 80 mm in dimension. Further investigations included biopsy and CT scans.
It was a solid fibrous tumour perforating the cortical plates. Histopathological examination confirmed Desmoplastic Fibroma. He had resection of the tumour by hemimandibulectomy and resection of the left condyle. It was reconstructed with a left fibula graft and temporomandibular prosthesis.

Keywords: Aggressive tumour; Bone; Desmoplastic fibroma; Mandible; Numbness to lip.