Case of the Week 166

The following small intestinal biopsy was taken from an elderly woman with cough, abdominal pain, and diarrhea. She reports no travel history outside of the United States, and has lived in the southeastern U.S. most of her life. Diagnosis?

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Hematoxylin and Eosin, 40 times original magnification

Hematoxylin and Eosin, 100 times original magnification


Hematoxylin and Eosin, 200 times original magnification


Hematoxylin and Eosin, 400 times original magnification