title: A case of refractory perforation at the floor of the mouth with ectopic bone formation.
abstract: Although most fistulae are not problematic, surgeons occasionally encounter recurrent and/or refractory fistulae in the field of oral and maxillofacial surgery. In this case report, the authors describe a case in which a patient experienced a recurrent and refractory fistula or perforation at his oral floor through the submandible, with heterotopic bone formation arising on both sides of the mylohyoid line. These heterotopic bones were connected to each other, forming a bone bridge at the center of the oral floor. A fistulectomy and wound closure with a tongue flap was successful. The perforation has not recurred after over four years of follow-up, and the bone bridge is still present.
authors.affiliation: Department of Regenerative Oral Surgery, Nagasaki University Graduate School of Medical Sciences, Japan. sohba@nagasaki-u.ac.jp
authors.forename: Seigo
authors.initials: S
authors.lastname: Ohba
authors.forename: Joji
authors.initials: J
authors.lastname: Sekine
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Tobita
authors.forename: Hideyoshi
authors.initials: H
authors.lastname: Ikeda
authors.forename: Izumi
authors.initials: I
authors.lastname: Asahina
mesh_terms: D000368:Aged; D017577:Cutaneous Fistula / Q000150:complications / Q000601:surgery*; D006801:Humans; D008297:Male; D008336:Mandibular Diseases / Q000150:complications*; D009060:Mouth Floor / Q000473:pathology* / Q000601:surgery; D016155:Oral Fistula / Q000150:complications / Q000601:surgery*; D009999:Ossification, Heterotopic / Q000150:complications* / Q000601:surgery; D010019:Osteomyelitis / Q000150:complications*; D012086:Reoperation; D013524:Surgical Flaps; D013529:Surgical Wound Dehiscence / Q000601:surgery