摘要目的 观察Riedle甲状腺炎(RT)的病理组织形态及其IgG4免疫组织化学表达,探讨RT与IgG4相关性疾病(IgG4-RD)之间的关系.方法 收集北京协和医院2012年4月至2015年8月间病理诊断的5例RT患者的临床资料,分析其临床表现、免疫组织化学及病理形态学特征.结果 5例患者,男性1例,女性4例,年龄52~78岁,平均59岁.5例患者都是出现甲状腺双叶多发结节,结节逐年增大,并且在出现周围组织压迫症状及体征时就诊.2例女性患者出现甲状腺功能减低.术前血清IgG水平升高2例,其余3例未测.B超显示结节多表现低回声或中低回声,偶有病例是低回声结节内部出现散在强回声.光镜下显示大量纤维组织增生伴不等量淋巴细胞及浆细胞浸润,4例可见闭塞静脉炎,3例出现嗜酸性粒细胞.5例患者的免疫组织化学IgG4阳性细胞计数与IgG4/IgG比值分别为:20个/HPF,16%;60个/HPF,82%;22个/HPF,28%;400个/HPF,266%;33个/HPF,71%.结论 RT与IgG4-RD光镜下具有相似的病理组织学表现,免疫组织化学染色显示RT中IgG4数值及IgG4/IgG比例均有不同程度增高,部分符合IgG4-RD的诊断标准,推测部分RT属于IgG4-RD.

abstractsObjective To observe the histopathological changes and immunohistochemical expression of IgG4 in Riedle thyroiditis ( RT ) and to study the relationship between RT and IgG4-related diseases (IgG4-RD). Methods A total of 5 RT patients were collected from the Department of Pathology, Peking Union Medical College Hospital during April 2012 to August 2014. The clinical and immunohistochemical features were analyzed in the 5 patients. Histopathologic analysis was performed on hematoxylin and eosin-stained sections. Results There were one male and four female patients, aged 52 to 78 years ( median 59 years) . Five cases were characterized by multiple nodules of thyroid, which increased year by year. All patients were found to have surrounding tissue compression symptoms and signs. Two female patients were found to have hypothyroidism. The serum concentration of IgG was elevated in 2 cases, and the serum concentration of IgG was not tested before operation in the remaining patients. By ultrasound, all presented as low echo or medium low echo. Strong echo occasionally appeared in hypoechoic nodules. Microscopically, fibrous tissue hyperplasia was infiltrated with varying numbers of lymphocytes and plasma cells. The occlusion of phlebitis was found in 4 cases and eosinophils were found in 3 cases. IgG4 counts and IgG4/IgG ratios in 5 cases were 20/HPF, 16%; 60/HPF, 82%; 22/HPF, 28%; 400/HPF, 266%and 33/HPF, 71%, respectively. Conclusions With the similar pathological manifestations between RT and IgG4-RD, immunohistochemical staining shows that the number of IgG4 positive plasma cells and IgG4/IgG ratio of RT are increased in varying degrees. Some cases meet the diagnostic criteria of IgG4-RD, and speculate that some cases of RT belong to IgG4-RD.