The investigation of choice to detect gastrinoma le<< than 5 mm size is-: (A) Endoscopic ultrasound, (B) Octreotide scan, (C) CT scan, (D) Poal venous sampling
Answer is A. Investigations Upper gastrointestinal endoscopy is the investigation of choice and should be performed promptly in any dyspeptic patient with 'alarm features' . Multiple biopsies from the edge and base of a gastric ulcer are required. Barium meal is a poor alternative, since any abnormalities must be followed by endoscopy and biopsy. Ref Davidson edition23rd pg804