Preablative serum thyroglobulin as predictor of disease-free survival in differentiated thyroid cancer

Diaz, RE; Veliz, J; Wohllk N.

Abstract

Background: Serum thyroglobulin (sTg) is an excellent marker of persistence or recurrence of disease in differentiated thyroid cancer (DTC), however its role as prognostic factor has not been fully established. Aim: To assess the value of the preablative thyroglobulin (pTg) as predictor of disease-free survival in DTC. Patients and Methods: Retrospective study of 104 patients with low and intermediate risk DTC subjected to total thyroidectomy and (131)iodine ablation. TSH, pTg and thyroglobulin antibodies (AbTg) were determined by chemiluminescence. Patients with distant metastases or presence of AbTg were excluded. Results were analyzed using receiving operating characteristic (ROC) curves. Results: During the 40 +/- 29 months of follow-up (range 6-132), 14 of 104 (13%) patients had recurrence of disease. pTg was an independent indicator to predict disease-free survival. Using a pTg cutoff of <10 ng/ml the negative predictive value was 99%, sensitivity 93%, specificity 82%, positive likelihood ratio (LR) 5.2 and negative LR 0,087. Conclusions: pTg value is useful as a prognostic marker in predicting disease-free survival in DTC patients with low or intermediate risk of recurrence.

Más información

Título según WOS: Preablative serum thyroglobulin as predictor of disease-free survival in differentiated thyroid cancer
Título de la Revista: REVISTA MEDICA DE CHILE
Volumen: 141
Número: 12
Editorial: SOC MEDICA SANTIAGO
Fecha de publicación: 2013
Página de inicio: 1506
Página final: 1511
Idioma: Spanish
Notas: ISI