Papillary thyroid carcinoma arising from a mature teratoma in a cryptorchid testis: a case report
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Struma testis is a rare entity, and malignant transformation of a testicular teratoma to papillary thyroid carcinoma (PTC) has only once been previously described. Furthermore, sold tumor metastases to the testis are rare, with a less than 1% rate of testicular metastases from solid tumors, and there are no reports of primary thyroid carcinomas metastasizing to the testis. We report the case of a 56 year old man who was found to have a cryptorchid testis containing a mature teratoma with malignant somatic component in the form of a 1.6 centimeter PTC.