Monthy Case Studies - 2012
Case #315 - January, 2012
A 31-year-old man, originally from Ecuador, vomited what appeared to be a long worm-like object. The object (Figure A) measured 27 centimeters in length. The object was sent to a pathology laboratory for sectioning and staining with hematoxylin and eosin (H&E). Figures B-D show what was observed microscopically by the attending pathologist. What is your diagnosis? Based on what criteria?
Acknowledgements: This case and images were kindly provided by Emory Johns Creek Hospital, Johns Creek, GA.
Answer to Case #315
This was a case of ascariasis caused by Ascaris lumbricoides. Diagnostic morphologic features included:
- An adult worm (Figure A) within the size range for A. lumbricoides.
- tall musculature (MU, Figure C).
- intestine with brush border (IN, Figure C).
- coiled ovaries (OV, Figure C).
- paired uterine tubes (UT, Figure B) full of eggs with mammillated shells (Figure D).
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Images presented in the monthly case studies are from specimens submitted for diagnosis or archiving. On rare occasions, clinical histories given may be partly fictitious.