Monday, May 15, 2017

Case of the Week 446

This week's very timely case was donated by George at Memorial Sloan Kettering Cancer Center. The following objects were seen in a wet mount of a concentrated stool specimen. They measure less than 20 micrometers in dimension and do not have an apparent operculum.

Here is their appearance using iodine:


Identification?


19 comments:

Kevin Barker said...

I am not sure, but with the potential medical history of cancer (cancer centre), the object not having an operculum and it's small size, I think it is an artefact like a yeast cell or fungal spore...

Jairo F said...

Given the association with cancer and its morphology could it be Enterobius vermicularis?

Dario Campese said...

I'm not sure... dicrocoelium dendriticum? perhaps this patients eated any ant ;-)

Ulises Rojo said...

Not a parasite. Probably a fungal spore or some sort of pollen grains

Sugar Magnolia said...

I believe the size is much too small to be Dicrocoelium, and not flattened on one side as you would see in Enterobius. I have to concur with Kevin Barker, and say it's a yeast cell of some kind, not a parasite. This is a bit of a stumper!

Sir Galahad said...

No parasites

Jacque U. said...

Mushroom spore. Great mimic of pinworm eggs.

Anonymous said...

The object is not compatible in morphology with those of parasites ova. Most likely a fungal spore, cannot associate with a yeast cell since there is no budding.
Florida Fan

Unknown said...

No parasite

gajanand mittal said...

No parasite

Warner Anderson MD said...

Not pinworm eggs. Makes me think eggs of another sp. Iodine stain prob key.

Anonymous said...

It's hookworm egg

Sugar Magnolia said...

Wait, wait.....I think I've got it, Bobbi! "Timely" - "Sloan Kettering Cancer Center" - This is some part of a seed or leaf of cannabis that has been ingested! At least, that's my crazy wild guess. Could it be? (I hope posters aren't limited to only one response!)

William Sears said...
This comment has been removed by the author.
William Sears said...

Morel mushroom spore

William Sears said...

However, just based on appearance alone how would you differentiate from metagonimus or heterophyes which can have hard to find operculi?

Anonymous said...

I would have to say artifact. It is too small for most other eggs and the ones that size mostly have an operculum.

Dario Campese said...

it' s to small for dicrocoelium... and no operculum...
perhaps spore mushroom, I'm in confusion.
Can you write the answer, please!!!!!

Anonymous said...

It looks like an artifact. Perhaps a mushroom spore. Too small for a mite egg though it reminds me ...