ABSTRACT
Cutaneous draining sinus tract of dental origin is often a diagnostic challenge, because of its uncommon occurrence and absence of dental symptoms. Several non-odontogenic disorders may produce a cutaneous sinus tract. Thus differential diagnosis of this clinical finding is of paramount importance. This article presents a case of facial lesions misdiagnosed as being of nonodontogenic origin. The correct diagnosis in this case was cutaneous sinus tract secondary to pulpal necrosis, suppurative apical periodontitis, and osteomyelitis. Facial sinus tract resolved after the patient received nonsurgical root canal therapy. As patients with cutaneous facial sinus tracts of dental origin often do not have obvious dental symptoms, possible dental etiology may be overlooked. Early correct diagnosis and treatment of these lesions can help prevent unnecessary and ineffective antibiotic therapy or surgical treatment.