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Midline (Dermoid) Cysts of the Floor of the Mouth: Report of 16 Cases and Review of Surgical Techniques

Longo, Francesco M.D., Ph.D.; Maremonti, Pietro M.D., Ph.D.; Mangone, Giuseppe Michele M.D.; De Maria, Giuseppe M.D.; Califano, Luigi M.D.

Plastic and Reconstructive Surgery: November 2003 - Volume 112 - Issue 6 - p 1560-1565
doi: 10.1097/01.PRS.0000086735.56187.22
Original Articles

A retrospective review of 16 cases of midline (dermoid) cysts of the floor of the mouth is presented, evaluating the different surgical approaches. Sixteen cases of patients with a diagnosis of midline cyst of the floor of the mouth, treated at the Maxillofacial Surgery Department of the School of Medicine and Surgery of the “Federico II” University of Naples (Naples, Italy), were observed over a 10-year period, between 1988 and 1998; age, sex, localization, diagnostic technique, and type of treatment were evaluated. Male patients were more frequently affected, with a male-to-female ratio of 3:1 (12:4 cases). Patients ranged in age from 5 to 51 years (average age, 27.8 years). The preoperative assessment was made using ultrasonography in all cases but one, computed tomography in eight cases, and magnetic resonance imaging in three cases. Regarding surgical techniques used, a transcutaneous approach was adopted for median geniohyoid cysts, an extended median glossotomy technique was used for very large median genioglossal cysts, a median glossotomy technique was used for median genioglossal cysts, and a midline incision of the oral mucosa along the lingual frenulum was used for sublingual cysts. During the postoperative course, there were no complications except for modest edema in three cases. Follow-up ranged between 24 months and 12 years; no relapses or malignant changes were observed. In the authors’ experience, the intraoral approach was also effective for the treatment of large lesions and led to very good cosmetic and functional results, whereas the extraoral incision was necessary only when the cysts were under the geniohyoid muscle.

Naples and Bologna, Italy

From the Department of Ear, Nose, and Throat–Head and Neck Surgery, National Cancer Institute “Fondazione Pascale”; Department of Maxillofacial Surgery, Bellaria Hospital; and Department of Maxillofacial Surgery, School of Medicine and Surgery “Federico II,” University of Naples.

Received for publication September 18, 2002;

revised January 27, 2003.

Francesco Longo, M.D., Ph.D.

Via Nicolardi, 97 (Parco Verde)

I-80131 Napoli, Italy

©2003American Society of Plastic Surgeons