Ulcerated gastric mucosal fragments infiltrated by an invasive moderately differentiated adenocarcinoma. The tumor is composed of crowded, irregular, and angulated and cribriform glands exhibiting fused and back-to-back architecture with minimal intervening stroma. These neoplastic structures are set within a desmoplastic background and are lined by atypical epithelial cells demonstrating nuclear enlargement, hyperchromasia, pleomorphism, loss of polarity, and prominent nucleoli.
Upper endoscopy reveals a large, recently bleeding ulcerative lesion on the incisura angularis that extends to the antrum and upper gastric body, covered with white exudates, fresh blood, and black clots.
Soft tissue fragments collectively measured 1.2 cm, totally embedded in one cassette.
Gastric ulcer, endoscopic biopsy: