Multiple endocrine neoplasia type II
Multiple endocrine neoplasia (MEN) type II is also known as mucosal neuroma syndrome or multiple endocrine adenomatosis. It is a collection of syndromes characterised by the presence of multiple endocrine tumours.
They are autosomal dominant in inheritance, and share medullary thyroid carcinoma as a feature. They are divided into:
- MEN IIa or Sipple syndrome
- MEN IIb
- familial medullary thyroid carcinoma

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