<prompt> RET proto-oncogene is associated with:-Medullary thyroid cancerParagangliomaPapillary thyroid cancerCNS tumors  <response>: RET proto-oncogene: Associated with development of MEN II syndrome affects thyroid adrenal medulla Therefore, patients have risk of developing medullary thyroid cancer pheochromocytoma. Thyroid tumors associated mutations: - Papillary thyroid cancer: RET-PTC gene - Follicular thyroid cancer: RAS gene - Anaplastic thyroid cancer: p53 gene 