04.This biopsy of the lower esophagus in a patient with chronic gastroesophageal reflux disease shows columnar metaplasia(Barrett's esophagus), and the goblet cells are typical of an intestinal type of epithelium. Squamous epithelium typical of the normal esophagus appears at the right.

04.食管返流病患者下段食管活检柱状化生(Barrett食管),杯状细胞表示肠型上皮,右边是正常的鳞状上皮.