If imaging shows focal nodular thickening rather than diffuse thickening, which condition is more likely?

• A. Giardia infection
• B. Inflammatory bowel disease
• C. Acute gastroenteritis
• D. Lymphoma

Answer: (D)

Focal nodular thickening on imaging points to a localized, mass-like process in the bowel wall. Among these conditions, lymphoma fits best because it commonly presents as discrete, focal, asymmetric wall thickening or a nodular lesion rather than a diffuse pattern of involvement.

Giardia infection tends to involve the small bowel diffusely with mild to moderate changes and is not typically seen as a single focal nodular thickening. Acute gastroenteritis produces diffuse mural edema across segments during the acute phase rather than a localized mass. Inflammatory bowel disease can cause segmental thickening, but it usually shows a broader, more irregular pattern with skip lesions and other inflammatory signs rather than a singular focal nodular thickening.

So, the focal nodular thickening pattern is most characteristic of lymphoma.