Endoscopic ultrasound (EUS) constitutes the most sensitive imaging method for the detection of small pancreatic endocrine tumours in asymptomatic MEN1 patients (sensitivity > 75%), while the combination of EUS with Octreoscan scintigraphy, increases the pancreatic tumoural detection rate to 90% [29]. Here, MEN1 is linked to pancreatic neuroendocrine tumor.