The value of endoscopy in the diagnosis of lymphoid nodular hyperplasia

A 16-year-old boy was hospitalized because of abdominal pain, diarrhea, and weight loss. Serum immunoelectrophoresis showed an absence of IgA and diminished levels of IgM and IgG. Radiological examination of the upper gut was suggestive of lymphoid nodular hyperplasia, a diagnosis confirmed by endoscopy and intestinal biopsy. In addition, infestation with Giardia Lamblia was proven by duodenal aspirate at the time of endoscopy.