Partialy ulcerated gastric mucosal fragments infiltrated by malignant tumor composed of complex, anastomosing glandular and cribriform architectures, with solid cohesive nests. The tumor cells exhibit marked anaplasia, with active mitosis. Surrounding stroma exhibits desmoplastic reaction, with associated mixed acute and chronic inflammatory cell infiltrate.
Gastric polypoidal thickening, with extension beyond mural serosa.
Soft tissue fragments collectively measured 0.9 cm, totally embedded.
Stomach, endoscopic biopsy: