Dr. Thiele provides comprehensive colon, rectal and endoscopic services for adolescent and adult patients. This includes colon resections and other procedures on the large and small intestines, including those afflicted with Crohn's disease. In addition, the full gamut of anorectal surgical expertise is available, including hemorrhoid, fissure and fistula treatment. Lower endoscopy, i.e. colonoscopy or flexible sigmoidoscopy, is available both from a diagnostic and therapeutic vantage. Dr.