异位甲状腺伴单纯甲状腺肿,是口腔颌面外利少见病,本文报告1例。患者女性,14岁,学生,颏下肿物二年余,开始无症状,发病一年后自觉烦燥时肿物有轻微胀痛感。门诊以“颏下囊性肿物”收入院。体检:全身检查无阳性体征。颏下偏右侧稍膨隆,张口时较明显,头低位时消失,口内外指诊于舌根下方触及一囊性肿物,约3×3×2cm大小,质地柔韧,边界清,光滑,活动,无压痛,与皮肤无粘连,随吞咽动作而稍有活动,舌体运动灵活,初诊“甲状舌管囊肿”。治疗:在局麻下行肿物摘除术,术中见肿物光滑,呈蓝灰色,边界清楚,质地极脆,易出血,与周围组织无粘连。肿物表面有丰富的动脉和静脉,基底 Ectopic thyroid with simple goiter is a rare disease outside the oral and maxillofacial margins. This article reported 1 case. The patient was female, 14 years old, and her student had a neoplasm of her armpit for more than two years. She became asymptomatic. She felt a slight sensation of swelling when she felt irritated after one year of illness. Outpatients were admitted to the hospital with “infratemporal cystic masses.” Physical examination: There are no positive signs of body examination. The right side of the armpit slightly bulging, more obvious when the mouth is open, disappeared when the head was low, touched a cystic mass below the base of the tongue, about 3 × 3 × 2cm size, texture flexibility, clear borders, smooth, activities, No tenderness, no adhesion to the skin, slight movement with swallowing movement, flexible tongue movement, initial diagnosis of “thyroglossal cyst.” Treatment: The tumor was removed under local anesthesia. During the operation, the tumor was smooth and blue-gray with clear boundaries. The texture was extremely brittle, easily bleeding, and there was no adhesion with the surrounding tissue. The tumor surface is rich in arteries and veins.