Mid-year 2003, I thought I had an ulcer. Anti-ulcer medications seemed to help until year’s end. A visit to the primary physician and a referral to a gastroenterologist set me up for an endoscopy. Although this wise diagnostician admitted that he’d never seen a GIST, or gastrointestinal stromal tumor, he said it was a real possibility. His biopsy, however, was "inconclusive."