Multiple endocrine neoplasia type 1 (MEN-1), also known as Wermer syndrome, is an autosomal dominant disorder characterized by the combined occurrence of two or more tumors (classically parathyroid, pancreatic, and pituitary). Due to the rarity of MEN-1 syndrome and its complexity, clinical management is difficult, and it is recommended to collaborate with a professional team including: clinical geneticist, endocrinologist, gastroenterologist, oncologist, endocrinologist, neurosurgeon, radiologist, and histopathologist. Here, a case of a young patient with MEN-1 syndrome is introduced, who was admitted to the Persian Gulf Martyrs Hospital in Bushehr due to hypercalcemia. The patient had a history of lipoma in childhood and currently has tumoral involvement of all three classic glands of this syndrome.