Figure 3: a Gastric antrum: thickened and erythematous mucosa with 3 deep ulcers, b Histology e&e low power: monomorphic cellular infiltrate in the lamina propria of the gastric mucosa, c Higher power e&e: ring cell morphology of the cellular infiltrate with copious granular cytoplasm and eccentric nuclei, d PASD: presence of mucine in the cell cytoplasm, in dark violet filling the gastric mucosa.