Shah Hussain Haider, Seher Muskan, Shiakh Khubeb Yousif, Ahmed Zeba, Rana Dua, Zehra Syeda Alishah, Subash Arun
Dow University of Health Sciences, Karachi, Pakistan.
PG ENT Department, Dow University of Health Sciences, Karachi, Pakistan.
Ear Nose Throat J. 2023 Sep 30:1455613231200823. doi: 10.1177/01455613231200823.
Epidermoid inclusion cysts are rare in the oral cavity, accounting for less than 0.01% of cysts found there. These cysts are defined as epidermoid if they contain only epithelial lining, dermoid if skin appendages, and teratoid if they contain other tissues such as muscle, cartilage, and bone. This case report describes a case of a plunging ranula that was later diagnosed as an epidermoid inclusion cyst. The patient is a 22-year-old male who presented with swelling in the floor of the mouth and difficulty eating solid foods for the past 4 months. Upon examination, a shiny, pink-colored mass measuring 1 cm × 5 cm was observed, which displaced the tongue upward and backward. MRI scan of the brain, face, and neck revealed a well-defined, non-enhancing cystic mass measuring 6.6 cm × 4.5 cm that extended beyond the sublingual area. Histopathological examination after surgical removal of the cyst revealed that the cyst wall was lined with stratified squamous keratinized epithelium with a retained granular layer, and the cavity was filled with lamellated keratin flakes. The patient recovered well after surgery; no recurrence was observed at the 6-month follow-up.
表皮样包涵囊肿在口腔中较为罕见，占口腔囊肿的比例不到0.01%。如果囊肿仅包含上皮衬里，则定义为表皮样囊肿；如果包含皮肤附属器，则为皮样囊肿；如果包含肌肉、软骨和骨骼等其他组织，则为畸胎样囊肿。本病例报告描述了一例后来被诊断为表皮样包涵囊肿的舌下腺囊肿。患者为一名22岁男性，在过去4个月中出现口腔底部肿胀，进食固体食物困难。检查时，观察到一个1厘米×5厘米的发亮粉红色肿块，该肿块将舌头向上和向后推移。脑部、面部和颈部的MRI扫描显示一个边界清晰、无强化的囊性肿块，大小为6.6厘米×4.5厘米，延伸至舌下区域以外。囊肿手术切除后的组织病理学检查显示，囊肿壁内衬有分层鳞状角化上皮，保留颗粒层，腔内充满层状角蛋白薄片。患者术后恢复良好；6个月随访时未观察到复发。
