Latent Metastases From Occult Sclerosing Carcinoma of the Thyroid

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Abstract
During routine examination of cervical lymph nodes from two patients, small inclusions were discovered that had the histological appearance of normal thyroid tissue. However, these inclusions were interpreted as metastases from occult thyroid carcinoma, and thyroidectomies were performed. Thorough examination of the thyroid glands disclosed tiny sclerosing follicular carcinomas in both cases. The coexistence of two relatively rare processes in these two patients supports the conclusion that the lymph-node inclusions represent true metastases from the sclerosing carcinomas. This interpretation is at variance with the widely held opinion that small inclusions of thyroid tissue in cervical lymph nodes are non-neoplastic nests of little, if any, clinical significance.

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