Pre-Operative Anti-Thyroid Antibodies in Differentiated Thyroid Cancer. Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists Noel, J. E., Thatipamala, P., Hung, K. S., Chen, J., Shi, R. Z., Orloff, L. A. 2021


To evaluate the significance of anti-thyroglobulin and anti-thyroid peroxidase antibody levels in locoregional metastatic disease in patients with well-differentiated thyroid cancer.Included patients underwent initial treatment for well-differentiated thyroid cancer at our institution between 2014 and 2018. The following variables were collected: age, sex, pre-operative thyroid stimulating hormone (TSH), thyroglobulin (Tg), anti-thyroglobulin antibody (TgAb), anti-thyroid peroxidase antibody (TPOAb); extent of surgery; T-stage; N-stage; extrathyroidal extension (ETE), extranodal extension (ENE), lymphovascular invasion (LVI), and multifocal disease. The relationships between pre-operative TPOAb, TgAb, Tg, and TSH and disease status were analyzed.405 patients were included in the study. 66.4% were female. Mean age was 52 years. Elevated TgAb was associated with the presence of lymph node metastases (LNM) in both the central and lateral neck (p<0.01), with stronger correlation with N1b compared with N1a disease (p=0.03). Presence of ETE was inversely associated with TgAb titer (p=0.03). TPOAb was associated with lower T- stage, fewer LNM, and lower likelihood of ETE (p=0.04, p=0.04, p=0.02). In multivariable analysis, TgAb=40 IU/mL was an independently predictive factor of higher N-stage (p<0.01 for N0 v. N1 and p=0.01 for N1a v. N1b), and for ENE (p<0.01). TPOAb=60 IU/mL was associated with lower T-stage (p=0.04 for T< 3) and absence of ETE (p=0.01).Elevated pre-operative TgAb was an independent predictor of nodal metastases and ENE, while elevated TPOAb was associated with a lower pathologic T and N stage. Pre-operative anti-thyroid antibody titers may be useful to inform disease extent and features.

View details for DOI 10.1016/j.eprac.2021.06.014

View details for PubMedID 34217894