Secondary neoplasm of the thyroid presenting as a goitre

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Abstract
Secondary neoplasm is a very rare finding in a goitre despite the numerous reports of metastatic deposits in the thyroid gland at necropsy. Eleven cases are reported of such deposits presenting clinically as a thyroid nodule, the sites of origin including a meningioma and an unusual carcinoma of the skin. Some of the factors, including pre-existent degenerative processes, believed to determine the incidence of secondary neoplasm in the thyroid, are discussed together with the problems of establishing the diagnosis.