Sunday, March 24, 2019

Case of the Week 537

This week's case comes from my lab with photos and video taken by Emily Fernholz. The objects shown were seen in a liver cyst aspirate. Identification?

Low power view (4x objective):
40x objective:



Here's a fun 'bird's eye' view (hit the play button twice):

11 comments:

Anonymous said...

E.granulosus

Sir Galahad said...

Echinococcus spp.

Sam said...

Protoscoleces of Echinococcus granulosus.

Anonymous said...

Hydatid sand of E. granulosas. Beautifully captured.
Florida Fan.

Anonymous said...

I agree with my predecessors: hydatid sand of Echinococcus granulosus.
Great pictures.
Luis.

Bernardino Rocha said...

Agree with hydatid sand (immature protoscolices)and an extruded protoscolex (young worm).

BISHAL said...

Echinococcus sp

Old One said...

I agree with Bernardino we are seeing protoscolicies as well as extruded scolex of young worms of the genus Echinococcus. The photos present some beautiful examples of calcareous corpuscles (classic feature of tapeworm tissue)

There are 4 species of Echinococcus that infect humans: E. granulosus, E. multilocularis, E. vogeli, and E. oligarthus. Without more information such as host location, medical imaging, measurement of rostellar hooklets, one cannot be certain of the species. However one can make an educated guess.

E. mulilocularis cysts are sterile (no protoscoicies), E. oligarchs is exceedingly rare in humans, E. vogeli photoscolicies contain very few calcareous corpusles, leaving E. grandulosis as the best guess.

Anonymous said...

Multilocular hydatid cysts of E. granulosus

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