Gastric adenocarcinoma of fundic gland type is extremely rare. A 78-year-old Japanese man with carcinomatosis of unknown primary origin underwent upper gastrointestinal endoscopy. The endoscopy revealed an elevated lesion with central ulcer (1.3 × 2 × 1.5 cm) in the gastric corpus of fundic gland area. One biopsy was taken. The biopsy showed well differentiated adenocarcinoma. The adenocarcinoma was composed of basophilic chief cell-like cells and acidophilic parietal cells. The biopsy diagnosis was well differentiated adenocarcinoma of the stomach composed of chief cell-like cells and parietal cells (gastric adenocarcinoma of fundic gland type).
Keywords: Stomach; adenocarcinoma; chief cells; fundic gland type; parietal cells.