In this case, we advised further evaluation with contrast-enhanced CT, but the patient's treating physician opted for biopsy.

The stomach is the most common site of gastrointestinal tract lymphoma, extranodal lymphoma, and MALT lymphoma.

Features that can help differentiate lymphoma from gastric carcinoma is that the wall thickening is more marked in lymphoma and extension to the duodenum is typical for lymphoma. Infiltration of adjacent organs is more likely in carcinoma. However, there is an overlap in the imaging appearance of the two conditions.