Thyroid Carcinoma, Familial Medullary, also known as familial medullary thyroid carcinoma, is related to multiple endocrine neoplasia, type iia and multiple endocrine neoplasia, type iib. An important gene associated with Thyroid Carcinoma, Familial Medullary is RET (Ret Proto-Oncogene), and among its related pathways/superpathways are RAF/MAP kinase cascade and Signal Transduction. The drugs D-Tyrosine and 3-Iodobenzylguanidine have been mentioned in the context of this disorder. Affiliated tissues include thyroid and lymph node, and related phenotypes are medullary thyroid carcinoma and nodular goiter