Al-Rawi Natheer H, Othman Sahar, Samsudin Ab Rani
College of Dental Medicine, University of Sharjah, Sharjah, UAE.
Case Rep Med. 2020 May 9;2020:2870715. doi: 10.1155/2020/2870715. eCollection 2020.
The peripheral ameloblastoma (PA), also known as extraosseous ameloblastoma, is a rare soft tissue tumor of odontogenic origin, accounting for 1-5% of all ameloblastoma. In some cases, saucerization of underlying bone is the only radiological evidence of this lesion, and PA has identical histological characteristics of intraosseous ameloblastoma. However, it is slow growing, less aggressive, and less invasive in nature. The present report describes a rare case of PA in the maxillary labial gingiva of a 37-year-old man with port-wine vascular malformation. PA was clinically diagnosed as a pyogenic granuloma, and following the surgical treatment of the lesion, its histological features were of ameloblastoma. This case illustrates the importance of including peripheral ameloblastoma in the differential diagnosis of painless exophytic gingival swelling.
外周型成釉细胞瘤（PA），又称骨外型成釉细胞瘤，是一种罕见的牙源性软组织肿瘤，占所有成釉细胞瘤的1%-5%。在某些病例中，其下方骨质呈碟形凹陷是该病变唯一的影像学表现，且PA具有与骨内型成釉细胞瘤相同的组织学特征。然而，它生长缓慢，侵袭性较小，本质上浸润性也较弱。本报告描述了一例罕见的PA病例，发生于一名37岁患有葡萄酒色斑状血管畸形的男性上颌唇侧牙龈。PA临床诊断为化脓性肉芽肿，在对病变进行手术治疗后，其组织学特征显示为成釉细胞瘤。该病例说明了在外周型成釉细胞瘤在无痛性外生性牙龈肿胀的鉴别诊断中的重要性。
