Fig. 2

Histopathology. a Biopsy (10x). b-f endoscopic resection: b Low power view (4x) showing poorly-differentiated area on the upper half and well-differentiated cystic area on the lower half. c Poorly-differentiated area (20x): tumor cells formed small glands and solid growth. d Well-differentiated area (20x): bland-appearing cystically dilated glands contained granular eosinophilic luminal secretion. e Cytomorphology of the tumor cells (60x): cytoplasm of tumor cells contained eosinophilic coarse granules. f Overlying squamous-columnar junction mucosa with reactive changes. No intestinal metaplasia was identified (10x)