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Natural History and Clinical Outcome of Differentiated Thyroid Carcinoma: a Retrospective Analysis of 1503 Patients Treated at a Single Institution

Overview
Journal Ann Oncol
Publisher Elsevier
Specialty Oncology
Date 2009 Sep 24
PMID 19773250
Citations 74
Authors
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Abstract

Background: The study evaluates clinical presentation and outcome of differentiated thyroid cancer (DTC) on a large series of patients homogeneously managed.

Patients And Methods: A cohort of 1503 DTC followed according to a standardized protocol entered the study. Main outcome measures were clinical presentation at the diagnosis, survival, morbidity and prognostic risk factors.

Results: Median age at diagnosis was 46 years. Papillary cancer and low pathological tumor-node-metastasis stages represented >80% of cases. Cancer specific survival at 5, 10 and 15 years was 98.6%, 94.7% and 87.4%; 10-year disease-free and progression-free survivals were 96.8% and 17.1%, respectively. Cancer-specific mortality rate was 2.5% [95% confidence interval (CI) 1.7% to 3.4%], recurrence rate was 0.6 % while morbidity rate was 12.6% (95% CI 11% to 14%). Response to radioiodine treatment is the strongest predictor of a good outcome in multivariate analysis (hazard ratio 211, P < 0.0001). Other independent predictor variables are sex, age, histology and distant metastases for survival and metastases for morbidity.

Conclusions: A rigorous initial therapeutic approach leads to a better survival and a very low morbidity. Patients who do not respond to radioiodine treatment have a worse prognosis.

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