Metagenous carcinoma of the breast: secondary deposit of papillary carcinoma of the thyroid in a breast with primary ductal carcinoma; a coincidence

ABSTRACT

Papillary carcinoma of the thyroid constitutes 80% of thyroid malignancies in adults. Females are affected at least twice as often as males. It metastasizes to distant sites very rarely, but to the cervical nodes quite often. Occasionally metastatic lymph node enlargement is the sole presenting feature. The tumor is slow growing and sometimes the patient has good survival even in spite of distant metastasis. The following case is a coincidence of two separate rare diseases, one is metastasis of the thyroid papillary carcinoma to the breast and the second one is coincidence of this unheard metastasis with carcinoma of the breast itself. By my knowledge, this is the first case of its kind being reported