Irritation fibroma (traumatic fibroma)
DESCRIPTION: Traumatic fibroma is a dome-shaped soft tissue mass usually found on buccal mucosa along the line of occlusion. Less frequently they may be found on lips and tongue. They are among the most common oral soft tissue lesions. The color is usually the same as the surrounding mucosa and the consistency is surprisingly soft. Patients are generally aware of the lesion being present months to years with little change. Histologically, they exhibit fibrous hyperplasia that is collagenous and acellular.
ETIOLOGY: The presumed etiology is trauma to the affected mucosa. Accidental biting probably accounts for most of these lesions.
TREATMENT: Excision
PROGNOSIS: Good
DIFFERENTIAL DIAGNOSIS: Salivary gland tumors and other soft tissue tumors may have a similar appearance but are usually more firm. Other lesions such as mucocele may also resemble traumatic fibroma.
