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Radiation-associated thyroid carcinoma

M S Razack, K Sako, K Shimaoka

    Journal of Surgical Oncology
    |January 1, 1980
    PubMed
    Summary

    Childhood radiation therapy for benign head and neck conditions increases thyroid nodule risk. A screening program found 22.4% of surgically treated patients had thyroid carcinoma, highlighting the need for long-term monitoring.

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    Area of Science:

    • Endocrinology
    • Oncology
    • Head and Neck Surgery

    Background:

    • Childhood radiation therapy for benign conditions is a known risk factor for thyroid abnormalities.
    • Long-term surveillance is crucial for detecting radiation-induced thyroid nodules.

    Purpose of the Study:

    • To assess the incidence of thyroid carcinoma and benign pathological changes in patients with a history of head and neck radiation.
    • To document postoperative complications in this patient cohort.

    Main Methods:

    • A thyroid screening program examined 735 patients treated with radiation therapy in infancy/childhood.
    • 159 patients with palpable thyroid nodules underwent function tests, laryngoscopy, and suppression therapy.
    • Surgical intervention (thyroidectomy) was performed for persistent or growing nodules.

    Main Results:

    • Of 49 surgically treated patients, 11 (22.4%) had thyroid carcinoma (papillary, follicular, or mixed).
    • High incidences of chronic thyroiditis, postradiation fibrosis, and follicular adenomas were observed.
    • Temporary hypocalcemia occurred in 3 patients; no wound infections, hematomas, or nerve palsies were reported.

    Conclusions:

    • Childhood radiation exposure significantly elevates the risk of developing thyroid nodules and carcinoma.
    • Long-term monitoring and surgical intervention are essential for managing these radiation-induced thyroid conditions.
    • Surgical outcomes in this cohort are generally favorable, with low rates of major complications.

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