D2I2.
cancer

Medullary thyroid cancer

Medullary cancer is a form of thyroid which originates from the parafollicular cells, which produce the calcitonin. Medullary are the third most common of all thyroid cancers and together make up about 3% of all thyroid cancer cases. MTC was first characterized in 1959.

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Plain-language summary adapted from Wikipedia. Not medical advice.