Insulinoma diagnosed by endoscopic ultrasonography-guided biopsy

Endoscopic ultrasound-guided fine-needle aspiration biopsy (EUS-FNA) is a n ew technique that seems to expand the utility of EUS, making definitive dia gnosis of pancreatic lesions possible. However, the exact indications for t he method, as well as its limitations, are not fully defined. We report on a patient with an insulinoma in the tail of the pancreas undetected by othe r imaging modalities that was conclusively diagnosed by EUS-FNA, Endoscopic ultrasonography is a unique imaging modality for localization of small pan creatic lesions. In combination with FNA, it represents a significant impro vement for the exact diagnosis of these tumors.