包膜内型甲状腺乳头状癌的超声表现

Characteristic ultrasonographic features of the encapsulated papillary thyroid carcinoma

目的探讨包膜内型甲状腺乳头状癌（encapsulated papillary thyroid carcinoma，EPTC）的超声声像图特征。方法回顾性分析2005年1月至2009年10月山西省肿瘤医院收治的33例EPTC患者的超声结果，依据声像图中肿块的形态、大小、边界、回声、周边晕圈、钙化等特征，结合病理结果，将33例EPTC患者的超声表现分为不规则或欠规则组和圆或椭圆形组。结果不规则或欠规则组21例，肿块形态不规则或欠规则，边缘呈锯齿状，回声明显减低，周边晕圈少见，肿块内可见沙粒样钙化；圆或椭圆形组12例，肿块形态圆形或椭圆形，边缘光滑，中等回声，周边多见晕圈，肿块内未见沙粒样钙化。圆或椭圆形组较不规则或欠规则组肿块内回声增高，周边晕圈多见，体积增大，淋巴转移少见。结论部分EPTC与滤泡性腺瘤的声像图特征相似，超声难以鉴别其良恶性，需手术病理检查，方可确诊。

Objective To evaluate the ultrasound （US） features of the encapsulated papillary thyroid carcinoma （EPTC）. Methods From January 2005 to October 2009, ultrasonographic retrospective analysis was done on 33 cases of EPTC in Shanxi Province Tumor Hospital. Based on uhrasonographic features including shape, size, border, echogenicity, hypoechoic halo and mierocaleifieation,33 cases of EPTC were classified into two groups： 21 cases in irregular shape group and 12 cases in spherical or oval shape group. Results EFFC in the irregular shape group showed some ultrasonographic features including jagged border, irregular tumor shape and marked hypoechogenicity, while the uhrasonographic features of EPTC in the spherical or oval shape group included smooth border, regular shape, isoechogenicity and hypoechoic halo. Hypoechoic halo and isoechogenicity were found more frequently in EPTC of spherical or oval shape group than those in EPTC of irregular shape group. The size of EPTC in the spherical or oval group was commonly larger than that of EPTC in the irregular shape group. Conclusions The findings indicate that EPTC have some ultrasouographic features similar to benign follicular thyroid tumors.