甲状腺癌颈淋巴结转移的螺旋CT表现

目的探讨甲状腺癌颈淋巴结转移的螺旋CT表现.方法1998-11～1999-12资料齐全44例甲状腺癌术前螺旋CT扫描图像进行回顾性分析,并与术后病理对照.观察淋巴结密度、分区和钙化,评价甲状腺癌颈淋巴结转移螺旋CT表现特点.结果据颈淋巴结转移一般特征中心坏死和环状强化.还具有(1)甲状腺癌颈转移淋巴结内细沙样钙化或斑块样钙化,(2)增强有明显强化22例(53.66%).平扫CT值28.00～50.54HU,增强后CT值62.85～145.78HU,并大多接近100HU或大于100HU.结论甲状腺癌颈淋巴结转移除中心低密度囊变、坏死和环状强化,淋巴结内见细沙样和斑块样钙化提示甲状腺内占位为恶性,淋巴结增强多较明显,CT值多接近或大于100HU.

Helical CT Findings of Neck Lymph Node Metastasis in Thyroid Carcinoma

Objective To study helical CT manifestations of neck lymph node metastasis in thyroid carcinoma.Methods Forty-four patients of neck lymph node metastasis in thyroid carcinoma were performed helical CT scans and were analyzed retrospectively to compare with pathology and operation.CT manifestations mainly included:density,sector and calcification.Results On the one hand,CT manifestations had common character of neck lymph node metastasis;that was low-attenuant center and rim enhancement,on the other hand,CT manifestations showed:(1)thinness-sand and mottle calcification in the metastatic lymph node;(2)metastatic lymph node obvious enhancement.After enhance average density ranged from 28.00~50.54 HU to 62.85~145.78 HU,average density was near or more than 100 HU.Conclusion In metastatic lymph node of thyroid carcinoma,the findings of thinness-sand and mottle calcification suggest malignant tumor in thyroid focal,and metastatic lymph nodes were obviously enhanced;average density of lymph node after enhancement is near or more than 100 HU.