[Sipple syndrome as a differential diagnosis in recurrent laryngeal nerve]

Two cases of Sipple's syndrome with the typical signs of medullary carcinoma of the thyroid, pheochromecytoma and parathyroid adenoma are presented. Cushing's disease and marfanoid habitus were demonstrated. They are classified as multiple endocrine adenopathy type 2A and 2B according to the modern nomenclature.