Abstract：Objective: To analyze the misdiagnosis and missed diagnosis of papillary thyroid carcinoma(PTC) without metastasis on CT, and to investigate the value and limitation of CT in diagnosis of PTC. Methods: Plain and enhanced CT scan of 16 cases of PTC(18 lesions in total) misdiagnosed or missed diagnosed proved by surgery and pathology was retrospectively analyzed. Reasons of CT misdiagnosis and missed diagnosis were analyzed. Results: There were a total of 18 PTC lesions(13 PTC lesions were shown on CT, 5 PTC micro-lesions were not shown on CT) in the 16 cases. In 9 cases, the thyroid lesion were multiple(7 cases were nodular goiter with 1 PTC lesion, while 2 cases had 2 PTC lesions). Thirteen cases were misdiagnosed, with an average diameter of 9.3 mm, among which 7 were misdiagnosed as nodular goiter, one was misdiagnosed as adenoma and five others were not definitely diagnosed. The average diameter of the 5 missed lesions was 2.4 mm. Conclusion: Multiple lesions, small diameter, lack of specific imaging character and lack of understanding of the typical signs are the main reasons of misdiagnosis of PTC. PTC lesions below 5 mm on CT are difficult to be shown, which may be the main cause of misdiagnosis.
许凡勇，张 黎，夏进东. 无淋巴结转移甲状腺乳头状癌的CT误漏诊分析[J]. 中国临床医学影像杂志, 2018, 29(6): 391-394.
XU Fan-yong, ZHANG Li, XIA Jin-dong. Analysis of misdiagnosis and missed diagnosis of papillary thyroid carcinoma without metastasis on CT. JOURNAL OF CHINA MEDICAL IMAGING, 2018, 29(6): 391-394.
