Norton, J A Intraoperative ultrasonographic localization of islet cell tumors. A prospective comparison to palpation. [electronic resource] - Annals of surgery Feb 1988 - 160-8 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0003-4932 Standard No.: 10.1097/00000658-198802000-00008 doi Subjects--Topical Terms: Adenoma, Islet Cell--diagnosisFalse Negative ReactionsFalse Positive ReactionsHumansIntraoperative PeriodPalpationPancreatic Neoplasms--diagnosisProspective StudiesUltrasonographyZollinger-Ellison Syndrome--diagnosis