NEW YORK (Reuters Health)—In most cases, rectosigmoidoscopy and colonoscopy assessments of disease activity in ulcerative colitis yield the same results, researchers report. “In clinical practice, rectosigmoidoscopy is enough to assess endoscopic activity and endoscopic healing,” Dr. Jean-Frédéric Colombel from Icahn School of Medicine at Mount Sinai, N.Y., told Reuters Health by email. Dr. Colombel and…