• 1. Department of Ultrasound Medicine, West China Hospital, Sichuan University, Chengdu 610041, P. R. China;
  • 2. Department of Ultrasound Medicine, Sichuan Longchang People’s Hospital, Longchang, Sichuan 642150, P. R. China;
  • 3. Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, P. R. China;
MA Buyun, Email: ws_mby@126.com
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Objective To explore the value of active surveillance (AS) with ultrasound for papillary thyroid microcarcinoma (PTMC) tumor growth.Methods A retrospective collection of 196 patients who underwent ultrasound-guided fine-needle aspiration biopsy at West China Hospital of Sichuan University from January 2014 to December 2018 were pathologically diagnosed as PTMC, and no cervical lymph node metastasis was found on ultrasound, and AS was performed. According to the change of the maximum diameter of the nodule, the patients were divided into the maximum diameter increase group, the maximum diameter stable group and the maximum diameter reduction group. According to the nodule volume change, the patients were divided into the volume increase group, the volume stable group and the volume reduction group. The differences in the patients’ gender, age, with Hashimoto’s thyroiditis, follow-up time, tumor size, boundary, shape, echo, aspect ratio, calcifications, multifocality, bilateral involvement, other nodule, surrounding tissues and cervical lymph nodes among the different groups were analyzed in order to clarify the related factors of tumor growth.Results One hundred and ninety-six patients had ultrasound AS time ranging from 6 to 79 months with the median (quartile) time were 16.0 (10.0, 30.0) months. One hundred and seventeen patients (59.7%) were in AS for 6 to 63 months with the median (quartile) time were 13.0. (8.0, 22.0), surgical treatments were performed after termination of AS. Forty-five patients (23.0%) continued to perform AS, 34 patients (17.3%) did not continue to perform AS in West China Hospital of Sichuan University. There was no significant reduction in the maximum diameter and volume of the nodules in all cases. Among them, 9 cases (4.6%) had an increase in the maximum diameter of the nodules, and 187 cases (95.4%) had a stable maximum diameter. Forty cases (20.4%) had an increase in the volume of the nodules, and 156 cases (79.6%) had a stable volume of the nodules. Comparison of the maximum diameter change of nodules between the two groups, there was a significant difference in the age of patients (P<0.05). Comparison of the maximum volume change between the two groups, there were significant differences in age, follow-up time and initial nodule volume (P<0.05). Logistic regression analysis showed that younger age was an independent risk factor for PTMC nodule growth [OR=0.638, 95%CI (0.601, 0.675), P=0.015].Conclusions Younger age is a risk factor for PTMC tumor growth. We should adopt a more active monitoring program for younger patients. The increase of PTMC tumor volume can be more easily monitored than the increase of its maximum diameter, so it can be used as an indicator to predict nodule growth at an earlier stage in AS.

Citation: YUE Can, HU Haiping, JIANG Yong, SHANG Lei, MA Buyun. Clinical value of ultrasonographic features in predicting tumor growth of papillary thyroid microcarcinoma during active surveillance. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2021, 28(10): 1294-1300. doi: 10.7507/1007-9424.202102044 Copy

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