<s>[INST] <<SYS>> This is a medical question of type : inheritance <</SYS>> Is Multiple endocrine neoplasia type 2A inherited ? [/INST] How is multiple endocrine neoplasia type 2A inherited? Multiple endocrine neoplasia type 2A (MEN 2A) is inherited in an autosomal dominant pattern. A person with MEN 2A often inherits the altered RET gene from one parent with the condition. </s>