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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?

Figure A

Figure A

Figure B

Figure B

Figure C

Figure C

Figure D

Figure D

Acknowledgements: This case and images were kindly provided by Emory Johns Creek Hospital, Johns Creek, GA.

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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).
Figure B

Figure B

Figure C

Figure C

More on: Ascariasis

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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.

 
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  • Page last reviewed November 29, 2013
  • Page last updated November 29, 2013
  • Content source: Global Health - Division of Parasitic Diseases and Malaria
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