r/veterinarypathology

Hello, this is a histology slide from a 5-week-old pig. Does anyone recognize the organ? Urgent!

10yo FS French Bulldog came in for trouble urinating and defecating, history of IVDD. Once arriving to hospital, her vaginal prolapsed and the tissue looked very abnormal. We got an impression cytology of the pus which is the image below. One of the vets theorized it was a TVT (transmissible venereal tumor) but we are located in a large US city, not a place known for seeing these. Patient was humanely euthanized hours later. What do you think?

My dog (14F, small mixed terrier) recently had an in-office FNA performed after I found a new lump (located on rear left leg) that didn't feel like the other lipomas she has. My vet doesn't think it's benign, but she also doesn't think it's a soft tissue sarcoma.

I work in a lab and had my pathologists review these photos. The hematopath was trying to determine whether a matrix was present in the clumping, and cytopath said they looked epithelioid or hisotocytic, but she was honest about the disparities between human and animal pathology.

I opted for an excisional biopsy to be performed next week for definitive diagnosis and can update when that report comes back. In the meantime, I'm just curious about the morphology, what kind of distinctive cellular features might differentiate those two options and what one would look for between a benign or malignant tumor (for instance, I don't see any mitotic cells here). I'm competent in peripheral smear morphology in humans, but even body fluids, we only report main WBC lineage. Anything abnormal is just "other" and referred to pathology. Anatomic pathology is not my wheelhouse at all.

Not looking for a diagnosis, just hoping to have some better understand of what I'm looking at if that's okay!

Saw this in blood smear on one of my patients , he recently had a nephrectomy a week ago, need help identifying the structure in centre seems to have three nuclei

Diff-Quik 100x

Is this some form of pseudohyphae?

Hello,

I have an interesting case I wanted to share and get some opinions on. I am sending several slides to a pathologist next week but wanted some thoughts.

Signalment and history: 8yr M Cane Corso. Presenting for an annual exam and owner is concerned about a mass on his dorsal neck. It was found last year and has grown a lot over the last couple months. No FNA was taken prior.

The mass is 5-6cm in diameter, cutaneous, firm, and the same color as his skin. There is mild alopecia in the center. The mass is non-painful and the surrounding skin is normal.

I did an FNA and removed ~6 mL of moderately thick brown/hemorrhagic fluid. The mass shrunk slightly but was still very firm. These photos are from a sample of the fluid. Differentials are an SCC w/necrotic center vs keratin inclusion cyst.

I am finding frequent singular nucleated keratinocytes with moderate aniscytosis and anisokaryosis. There is a lot of necrotic debris and pyknotic neutrophils. I found very rare sheets of 5-10 epithelial cells. This is an image of one sheet with a nucleated keratinocyte next to it.

I wish I would’ve taken more photos. I can definitely get more next week. Thanks!

This is a biopsy of a lesion on the dog's back. I'm pretty sure that is MCT. What do you think?