Etiology: linked to previous radiation therapy and tissue trauma such as a burn injury
Transmission: not applicable
Characteristics: common in thigh bone around the knee joint; lesions present as gradually enlarging, painless masses; ulceration of the surface, secondary to trauma, may occur as the lesion enlarges. With enlargement, the patient may occur as the lesion enlarges. With enlargement, the patient may complain of pain, swelling, paresthesia, and loosening of the teeth
Dental Implications: early identification of enlarging soft tissue masses is of utmost importance in obtaining a favorable treatment outcome
Treatment: surgical excision with wide margins
Prognosis: guarded; local reoccurrence in 50-70% of cases, most common cause of death; 5-yr survival rate is 50-70%