0.3 is diagnostic. Localization of the tumour Once the diagnosis has been made, localization of the tumour is must for surgery. The most important examination for localization of tumour is intraoperative ultrasound, which can indentify pancreatic tumour in all cases. It is more sensitive than any other method Other important methods of localization - High resolution CT and MN. Endoscopic ultrasound examination of pancreas. Selective arteriography T/T - Surgical excision is the t/t of choice - Since most insulinomas are benign simple enucleation is done.">