Sheng-Fong Kuo1, Tzu-Chieh Chao2, Hung-Yu Chang3, Chuen Hsueh4, Chih-Lang Lin5, Kun-Chun Chiang6, Wen-Yu Chuang4, Yung-Chih Chen7, Jen-Der Lin8. 1. Department of Endocrinology and Metabolism, Chang Gung Memorial Hospital, Keelung, Taiwan; Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan. 2. Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan; Department of General Surgery, Chang Gung Memorial Hospital, Kwei-Shan, Taoyuan, Taiwan. 3. Department of Endocrinology and Metabolism, Chang Gung Memorial Hospital, Kwei-Shan, Taoyuan, Taiwan. 4. Department of Pathology, Chang Gung Memorial Hospital, Kwei-Shan, Taoyuan, Taiwan. 5. Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan; Department of Gastroenterology, Chang Gung Memorial Hospital, Keelung, Taiwan. 6. Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan; Department of General Surgery, Chang Gung Memorial Hospital, Keelung, Taiwan. 7. Department of Internal Medicine, Chang Gung Memorial Hospital, Keelung, Taiwan. 8. Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan; Department of Endocrinology and Metabolism, Chang Gung Memorial Hospital, Kwei-Shan, Taoyuan, Taiwan. Electronic address: einjd@adm.cgmh.org.tw.
Abstract
BACKGROUND/ OBJECTIVE: To investigate the influence of serum anti-thyroglobulin antibody (TgAb) on the prognosis in papillary thyroid cancer (PTC) patients. METHODS: In this retrospective study, the participants were enrolled from 1206 PTC patients (927 women, 279 men; mean age, 42.2 years) with T2 and higher, or N1 or M1 classifications in tumor-node-metastasis staging after total thyroidectomy. We recorded the final serum TgAb data (on thyroxin therapy) at the end of follow-up in 2012. Patients were classified as negative TgAb or positive TgAb groups on the basis of their serum TgAb levels (< 70 IU/mL or ≥ 70 IU/mL). RESULTS: Among the 1206 patients, after mean follow-up for 11.6 ± 6.1 years (range, 2.0-29.2 years), there were 75 with positive TgAb and 1131 with negative TgAb. Patient categorization depending on the follow-up time (2-5 years after surgery, 5-10 years after surgery, and 10-30 years after surgery) was performed. In comparison to traditional risk factors, such as age, tumor size, and sex, which were important prognostic factors for cancer recurrence and mortality in PTC patients, there was no significant difference in the prognosis between positive TgAb patients and negative TgAb patients by the multivariate analyses (cancer recurrence, p = 0.164, p = 0.112, p = 0.202, respectively; cancer mortality, p = 0.181, p = 0.646, p = 0.656, respectively) based on the different follow-up times. CONCLUSION: Positive serum TgAb was not a risk factor, and was not associated with the prognosis of PTC patients.
BACKGROUND/ OBJECTIVE: To investigate the influence of serum anti-thyroglobulin antibody (TgAb) on the prognosis in papillary thyroid cancer (PTC) patients. METHODS: In this retrospective study, the participants were enrolled from 1206 PTC patients (927 women, 279 men; mean age, 42.2 years) with T2 and higher, or N1 or M1 classifications in tumor-node-metastasis staging after total thyroidectomy. We recorded the final serum TgAb data (on thyroxin therapy) at the end of follow-up in 2012. Patients were classified as negative TgAb or positive TgAb groups on the basis of their serum TgAb levels (< 70 IU/mL or ≥ 70 IU/mL). RESULTS: Among the 1206 patients, after mean follow-up for 11.6 ± 6.1 years (range, 2.0-29.2 years), there were 75 with positive TgAb and 1131 with negative TgAb. Patient categorization depending on the follow-up time (2-5 years after surgery, 5-10 years after surgery, and 10-30 years after surgery) was performed. In comparison to traditional risk factors, such as age, tumor size, and sex, which were important prognostic factors for cancer recurrence and mortality in PTC patients, there was no significant difference in the prognosis between positive TgAb patients and negative TgAb patients by the multivariate analyses (cancer recurrence, p = 0.164, p = 0.112, p = 0.202, respectively; cancer mortality, p = 0.181, p = 0.646, p = 0.656, respectively) based on the different follow-up times. CONCLUSION: Positive serum TgAb was not a risk factor, and was not associated with the prognosis of PTC patients.