Multiple choice Mutation in the RET oncogene is associated with increased risk of medullary thyroid cancer adenocarcinoma prostate cancer the PNET cancers endometrial cancer Reveal answer Fill a bubble to check yourself A Correct answer Explanation RET mutation is responsible for increased risk of medullary thyroid cancer, as well as multiple endocrine neoplasia 2, in which pheochromocytoma and parathyroid adenoma also occur.