Y Rosen, MD & P Meseguer, MD posted a photo:

Stomach. 60 year old male with rx/reparative changes and these crystals that are present in all level sections of the tissue. These are unknown birefringent crystals. Has it been considered that they could be resins from pills or an artifact/contaminant.

Images contributed by Dr. Dan Graham - @DanGrahamMD

regisfiacre posted a photo:

Dicyrtomina ornata

regisfiacre posted a photo:

Sminthurinus aureus

regisfiacre posted a photo:

Sminthurinus aureus

regisfiacre posted a photo:

Dicyrtomina ornata

Alexey Kljatov posted a photo:

Tiny star plate with pattern of "maple leaves" around center. December 2022.

Ideas for home and office decor, interior designs and gifts (300+ macro photos of real snowflakes, 30+ different products: framed, canvas, acrylic, metal, wood prints; posters, greeting cards, and more): Artist website.

Collection of snowflakes in full resolution, lossless PNG format (with masks and isolated versions on transparent background) available at Patreon.

Here is licenses for commercial use.

sofiyalabtronus posted a photo:

Microscopic Camera specialized imaging device to capture high-resolution images or of specimens under a microscope. Allowing users to see the live image on a computer monitor for sample positioning and focusing. Ultra Fine Color Engine technique. Sensor Model=16M/MN34120(C)CMOS-color-sensor; Sensor Dimension=1.335×1.335µm pixels; Resolution=16-mp;Cooling System=Natural; Spectral Range=380 to 650nm FOR MORE VISIT Labtron.us

Y Rosen, MD & P Meseguer, MD posted a photo:

Voided urine sample. In his 60s. It appears full of these oval structures with a sort of central nucleus and striations parallel to the short axis.
These structures are foreign bodies of different sizes (2-6 times the size of an umbrella cell). Most pathologists who have examined the photos propose that they are navicular diatoms. The frustule, which is what defines diatoms, was not very evident in the images, but after increasing the contrast it now seems more evident.
This finding in urine cytology is considered a contaminant, although there is no explanation for how it got there. It has been proposed that it was during the collection of the sample (diatoms may be present in homes, for example if there are aquariums). Another possibility proposed is during the processing of the sample, although this seems unlikely, as it is the only sample in the laboratory that has these structures.
The image at the bottom right shows a diatom found in a pond, for comparison.

Images contributed by Dr. Pepe Jiménez Heffernan - @pepeheffernan
Image at the bottom right contributed by Dr. Pascual Meseguer - @Histopatolomon

There are other images of diatoms in this atlas that can be found by using the SEARCH feature.

Y Rosen, MD & P Meseguer, MD posted a photo:

Food remains that constitute feces frequently accumulate in the lumen of the appendix. Occasionally these fragments obstruct the lumen and cause appendicitis. This is a seed fragment found in the lumen of the cecal appendage along with other plant cells. We can identify the structure of the cortex as well as the seed storage cells.

Images contributed by Dr. Med Amine - @Drmerm

Y Rosen, MD & P Meseguer, MD posted a photo:

This is a fragment of seed found in the lumen of a cecal appendix. We can identify the structure of the cortex, as well as the seed storage cells.

Images contributed by Dr. Med Amine - @Drmerm