下顎角部に発生した奇形様囊胞の1例

• Published in: 日本口腔外科学会雑誌 Vol. 65; no. 7; pp. 479 - 483
• Main Authors: 齋藤, 大輔, 小林, 正治, 原, 太一, 丸山, 智, 林, 孝文, 西山, 秀昌
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 20.07.2019
• Subjects: 下顎角部; 奇形様囊胞; 軟骨
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.65.479

Dermoid cysts are classified into three types based on pathological cellular components: dermoid, epidermoid, and teratoid cysts. Teratoid cysts have skin appendages such as sweat glands, sebaceous glands and hair follicles, and additionally have cartilage, muscle, vascular, respiratory tissues and gastrointestinal tissues derived from mesoderm or endoderm. We describe an extremely rare case of a teratoid cyst around the mandibular angle. A 17-year-old woman was referred to our hospital because of a swelling around the left mandibular angle. Initial clinical examinations revealed a soft elastic mass that measured 45 × 45 mm. The lesion was preoperatively diagnosed as dermoid cysts or lipoma around the mandibular angle on computed tomography (CT) and magnetic resonance imaging (MRI). The lesion was removed and the histopathological diagnosis was a teratoid cyst containing squamous epithelium, sebaceous glands, hair follicles, sweat glands, arrector pili muscle, and cartilage. Recurrence has not occurred as of 6 years 6 months after surgery.