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Desmoplastic fibroma of the mandible.

Desmoplastic fibroma of bone is a rare myofibroblastic tumor, locally aggressive, benign lesion that histologically resembles a desmoid tumor of the soft-tissue. It was initially described in 1958 by Jaffe, who separated it as a distinct entity from other intraosseous fibrous tumors. This tumor constitutes <1% of bone tumors and about 0.3% of all benign osseous tumors and it usually involves the tibia, scapula and femur [1]. The mandible represents the fourth most commonly affected site. It has a predilection to affect the posterior part of the mandible, most often in the ramusangle region. Clinical symptomatology is not specific. The imagery makes it possible to appreciate the extensive potential of the tumor .The histological appearance of the desmoplastic fibroma is identical to that of the extra-osseous desmoid, although the fibroma is infiltrative; there are no mitoses or nuclear atypia. The treatment is surgical and the quality of this treatment condition the occurrence of recurrences [1,2].