Odontogenic Cutaneous Fistula: A Zombie Diagnosis

Odontogenic cutaneous fistula (OCF) is a pathologic communication between the cutaneous surface of the face and oral cavity. Majority of oral cutaneous fistulas are reported to arise from chronic dental infection. Delay in treatment may result in chronic tissue injury as well as cosmetic deformities. Lesions are often misdiagnosed, leading to delayed management. Misdiagnosis may be the result of the variability of clinical morphological presentation and location of lesions compounded by the lack of knowledge that these lesions can have dental etiology. It is estimated that half of patients with OCF undergo multiple dermatologic surgical operations, antibiotic regimens, and other excisions and biopsies before a correct diagnosis is made. Herein, we present a systematic review to detail cases of odontogenic cutaneous lesions that had been previously misdiagnosed or managed inappropriately. In addition, we include a case report from our own institution. The aims are to demonstrate various presentations of OCF, increase awareness of plastic surgeons and oral maxillofacial surgeons to this pathological condition, and reinforce the importance of prompt diagnosis and treatment.

The study was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. A literature search was conducted in PubMed, Web of Science, and Cochrane databases from January 1, 2013 to July 24, 2023. The following search terms were utilized: "odontogenic cutaneous fistula" OR "odontogenic cutaneous sinus."

Twenty-three articles published between 2013 and 2023 were included in this review. In addition, we report a case from our own institution. A total of 28 cases were included in the review.

Diagnosis of OCF is challenging for numerous reasons. Misdiagnosis can lead to multiple trials of antibiotics and surgical procedures as well as reoccurrence of the lesion. Cases summarized highlight the importance of communication between oral maxillofacial surgery, plastic surgery, other medical subspecialists, and dentists in the evaluation of patients with head and neck lesions. Physicians should consider dental etiology in the differential diagnosis of orofacial skin lesions, even if teeth appear normal on oral examination.