Medullary Thyroid Carcinoma Presenting as Metastatic Disease to the Breast

Medullary Thyroid Carcinoma Presenting as Metastatic Disease to the Breast

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Medullary thyroid carcinoma (MTC) is a neuroendocrine tumor that is derived from C cells of the thyroid gland.It is a rare aggressive tumor, known to metastasize to lymph nodes, liver, bones, and lungs.A 41-year-old female, who Ski de fond - Accessoires - Lunettes presented with a breast mass, was initially diagnosed with invasive ductal carcinoma.

She was also found to have a thyroid mass which was later diagnosed as MTC.On a rereview of the breast pathology, the morphologic features were strikingly similar to the MTC.Further investigation Dog Treats revealed that this was in fact a very rare case of MTC that had metastasized to the breast.

We have identified 20 cases of MTC metastasizing to the breast in the literature that supports its occurrence as a real possibility.Albeit rare, medullary thyroid carcinoma should be considered in the differential diagnosis of a breast mass.