Histological analysis of gastric biopsy specimens.
Histological features including lymphocyte infiltration (A), neutrophil
infiltration (B), intestinal metaplasia (C), and epithelial erosion (D)
were examined using gastric biopsy samples from healthy volunteers and
patients with active, healing, and scarring duodenal ulcers, and their
grades determined. Statistical analysis was by the Mann-Whitney U test.