Date of Presentation:8/24/2016

Attending pathologist: Christina Arnold, M.D.

Presented by: I-sanna Gibbons-Fideler, M.D.

Prepared by: I-sanna Gibbons-Fideler, M.D.; Michael Markow, M.D.; Keluo Yao, M.D.

Organ:Small intestine, duodenum


A female in her 20s presents for diarrhea, nausea and vomiting for several weeks. The following biopsy is from the endoscopically unremarkable duodenum.

What is your diagnosis?

  1. Microsporidiosis
  2. Isosporasis
  3. Cryptosporidiosis
  4. Giardiasis