Monday, October 16, 2017

Case of the Week 464

This week's case was generously donated by Dr. Julie Ribes. The following objects were seen in a Papanicolaou-stained urine specimen from an elderly man with hematuria. They varied in size, measuring ~ 70 micrometers in length. All images were taken using the 40x objective.

Identification?





12 comments:

Anonymous said...

I vote for some sort of crystal.

Sheldon Campbell said...

Uric acid crystals.

Idzi P. said...

I've got no experience with pap stain, but I agree: uric acid crystals.

Anonymous said...

The pictures give me the appearance of crytals aggregates forming possibly around a uric acid nucleus.

Florida Fan

Anonymous said...

I also agree with my predecessors. They look like uric acid crystals. Too small to be S. haematobium eggs, although they can sometimes lead to confusion Parasite eggs in urine cytology: Fact or artifact?

Sugar Magnolia said...

I also agree. The variation in size, along with the distinct lack of any anatomical features, points me in the direction of a crystal of some sort, likely uric acid due to the diamond shape. The edges of the structure appear "sharp", even ragged, particularly in the third photo. The delicate and "fragile" appearance of the object in the last photo is especially unique, and I would not expect to see anything of the sort in an ova, cyst, or parasite.

Anthony Rochester said...

I was also thinking uric acid crystal

Anonymous said...

Artifact of some sort, likely crystal. I wouldn't try to identify crystal type on this particular preparation.

Atiya Kausar said...

Uric acid crystals from morphology and size

ted fan said...

I doubt it a Schistosoma haematobium ova surrounded by many crystals.

ali mokbel said...

.....And the correct answer is?...

drivanp said...

look like uric acid crystals