Thyroid Nodules

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2 studies · 1 recommendation

Last updated: February 21, 2026

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Thyroid nodules carry significant malignancy risk requiring prompt medical evaluation

Across 2 studies involving over 656 participants, thyroid nodules demonstrate a strong association with thyroid cancer. A case-control study of 245 thyroid cancer cases and 411 controls found an extremely strong link between benign thyroid nodules and subsequent cancer (lower 95% CI limit = 7.84), with goitre history showing RR = 5.61 (95% CI: 2.13–14.77). A Brazilian consensus of 8 thyroid specialists confirmed that 5–10% of palpable thyroid nodules are malignant, with approximately 10% of adults presenting with palpable nodules and frequency increasing with age. Differentiated thyroid carcinoma accounts for 90% of thyroid malignancies. While most patients achieve favorable outcomes with adequate treatment, a subset develops aggressive disease, making early evaluation of any palpable thyroid nodule essential for timely diagnosis and intervention.

Evidence

Risk Factors for Thyroid Cancer in Northern Italy

Authors: BIDOLI, ETTORE, FASSINA, AMBROGIO, FRANCESCHI, SILVIA, MAZZOLINI, ANNA, SERRAINO, DIEGO, TALAMINI, RENATO, VECCHIA, CARLO LA, VIANELLO, STEFANO

Published: August 2, 2017

In a case-control study of 245 thyroid cancer cases and 411 controls, 18 cases had a history of benign thyroid nodules compared to 0 controls (lower 95% confidence limit = 7.84), indicating an extremely strong association. Additionally, goitre history showed a relative risk of 5.61 (95% CI: 2.13–14.77), and residence in endemic goitre areas for longer than 20 years yielded RR = 2.29 (95% CI: 1.23–4.29).

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Thyroid nodules and differentiated thyroid cancer: Brazilian consensus

Authors: Carvalho, Gisah A., Graf, Hans, Maciel, Léa M. Zanini, Maciel, Rui Monteiro de Barros, Maia, Ana Luiza, Rosário, Pedro W., Vaisman, Mario, Ward, Laura S.

Published: January 1, 2007

Brazilian consensus by 8 thyroid specialists from the Sociedade Brasileira de Endocrinologia e Metabologia, representing multiple reference medical centers across Brazil. Approximately 10% of the adult population presents with palpable thyroid nodules, with frequency increasing with age. Of these nodules, 5-10% are malignant. Differentiated thyroid carcinoma accounts for 90% of all thyroid malignant neoplasias. Most patients with differentiated thyroid cancer achieve mortality rates similar to the general population when treated adequately, but a subset develops aggressive disease with poor prognosis despite current diagnostic and therapeutic advances, underscoring the need for early evaluation of any palpable thyroid nodule.

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