Diverticulum of the buccal mucosa: A rare case report and review of the literature

• Main Authors: Dehari, H. (Author), Hasegawa, T. (Author), Hiratsuka, H. (Author), Kobayashi, J.-I (Author), Miyamoto, S. (Author), Miyazaki, A. (Author), Nakai, H. (Author), Nishiyama, K. (Author), Ogi, K. (Author), Tsuchihashi, K. (Author)
• Format: Article
• Language: English
• Published: BioMed Central Ltd. 2018
• Subjects: aged; Aged; Buccal glands; Buccal mucosa; Buccinator muscle; case report; diagnostic imaging; diverticulosis; Diverticulum; human; Humans; Magnetic Resonance Imaging; male; Male; mouth mucosa; Mouth Mucosa; nuclear magnetic resonance imaging; Oral cavity; pathology; Tomography, X-Ray Computed; x-ray computed tomography
• Online Access: View Fulltext in Publisher

 Background: Cases of diverticula of the buccal mucosa are extremely rare. Literature searches of databases such as PubMed/MEDLINE for this condition have revealed only 10 case reports. In this case report, we describe our experience in the management of this rare condition and review the previous 10 previously reported cases. Case presentation: A 66-year-old man presented with a pouch containing inspissated food debris located posterior to the papilla of the parotid duct in his left buccal mucosa. The diagnosis of a diverticulum arising from the buccal mucosa was confirmed based on clinical and radiographic findings. Gross examination of the locally resected tissue specimen revealed a pouch measuring 14mm in diameter and 8mm in depth, that was whitish in color and had an elastic, soft, and smooth surface. Microscopic examination revealed a cyst-like lesion lined by stratified squamous epithelium and granulation tissue, with a chronic inflammatory infiltration in the peripheral stromal tissue of the epithelial layer. After surgical excision of the lesion, there was no recurrence during the follow-up period of 5years and 10months. Conclusions: We have presented a rare case of a diverticulum of the buccal mucosa. This is the first report of a case confirmed not only by the clinicopathological findings, but also by computed tomography and magnetic resonance imaging findings. From the magnetic resonance imaging and intraoperative findings, we inferred that the diverticulum was caused by an idiopathic developmental anomaly due to a partial defect of the buccinator muscle. © 2018 The Author(s).