患者女性，31岁，颈前右侧肿块数年，近一个月来突然增大，于1995年正月10日住院治疗。查体见右颈前三角区内有一40mm×50mm大小肿块，上界清楚，下缘深入胸骨后，呈实质性，表面尚光滑，随吞咽上下活动。术前B超检查提示右侧甲状腺腺癌伴出血囊性变，CT检查提示右甲状腺错构启 The patient, a 31-year-old female, had a mass on the right side of the neck for several years and suddenly increased in the past month. She was hospitalized on the 10th day of the first month of 1995. The physical examination revealed a 40mm x 50mm mass in the front triangle of the right neck. The upper border was clear. After the lower edge deep into the sternum, it was substantive and the surface was still smooth. Preoperative B-ultrasound examination revealed right thyroid adenocarcinoma with bleeding cystic degeneration. CT examination suggested right thyroid dysconformation