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Case #498 – August, 2019

A 32-year-old man presented with loose stools for a couple of weeks and a history of abdominal pain and a pseudo-jejunal obstruction from a nodule. The nodule was excised, sectioned and stained with Hematoxylin and Eosin (H&E). Images taken at 200x and 400x shows what appears to be a cross section of a worm (Figures A and B). What is your diagnosis? Based on what morphological features?

Figure A

Figure A

Figure B

Figure B

Images presented in the dpdx case studies are from specimens submitted for diagnosis or archiving. On rare occasions, clinical histories given may be partly fictitious.

DPDx is an educational resource designed for health professionals and laboratory scientists. For an overview including prevention, control, and treatment visit www.cdc.gov/parasites/.