title: Contralateral recurrence of necrotizing sialometaplasia of the hard palate after five months: a case report.
abstract: Necrotizing sialometaplasia usually heals within 4 to 10 weeks with conservative treatment, and rarely recurs. When necrotizing sialometaplasia is present on the hard palate it may occur unilaterally or bilaterally. In this case, necrotizing ulceration occurred on the left hard palate of a 36-year-old woman after root canal treatment of the upper left first premolar under local anesthesia. After only saline irrigation the defect of the lesion completely healed and filled with soft tissue. After 5 months, however, a similar focal necrosis was found on the contralateral hard palate without any dental treatment having been performed on that side and progressed in similar fashion as the former lesion. We conducted an incisional biopsy and obtained a final pathological diagnosis for the palatal mass of necrotizing sialometaplasia. At the 3-year follow-up, the patient's oral mucosa of the hard palate was normal, without any signs and symptoms of the condition. We report a case of a second occurrence of necrotizing sialometaplasia on the contralateral side from the first, with a time lapse between the first and second occurrence.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, Korea.
authors.forename: Chan-Woo
authors.identifier: 0000-0003-4118-075X
authors.initials: CW
authors.lastname: Jeong
authors.affiliation: Department of Oral and Maxillofacial Surgery, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, Korea.
authors.forename: Taegyun
authors.identifier: 0000-0003-1409-3300
authors.initials: T
authors.lastname: Youn
authors.affiliation: Department of Oral Pathology and Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul, Korea.
authors.forename: Hyun Sil
authors.identifier: 0000-0003-3614-1764
authors.initials: HS
authors.lastname: Kim
authors.affiliation: Department of Oral and Maxillofacial Surgery, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, Korea.
authors.forename: Kwang-Ho
authors.identifier: 0000-0003-1942-2986
authors.initials: KH
authors.lastname: Park
authors.affiliation: Department of Oral and Maxillofacial Surgery, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, Korea.
authors.forename: Jong-Ki
authors.identifier: 0000-0002-7381-3972
authors.initials: JK
authors.lastname: Huh
keywords: Necrotizing sialometaplasia; Palate