FIBROMATOSIS OF THE ORAL AND PARAORAL REGION

The fibromatoses represent a group of infiltrating fibrous proliferati ons that exhibit a clinical behavior and biologic Potential intermedia te between benign fibrous lesions and fibrosarcoma. The head and neck region is a common site of involvement for these lesions especially in children and young adults. However, the oral structures per se are no t often the site of origin. In this study of 31 cases of fibromatosis that involved the oral and paraoral region, patient ages ranged from b irth to 51 years with 74% appearing in the first decade. The most comm on clinical presentation was a painless mass that involved the cheek, tongue, or submandibular region. Erosion of bone was a frequent findin g in lesions arising in soft tissue contiguous with the jaws. After su rgical excision, lesions recurred in five patients for a recurrence ra te of 23.8%. One lesion recurred twice. The average interval from init ial treatment to recurrence was 7.6 months, The recurrence rate observ ed in this series is significantly lower than that generally reported for fibromatosis of the head and neck (50% to 70%). This is most likel y due to the exclusion in this investigation of lesions in the supracl avicular region.