Mass on the prepuce in a dog

RE: Mass on the prepuce in a dog

Jill Butterworth — Thu, 22 Aug 2019 10:19:15 GMT

As a salvage idea: a permanent urethrostomy is a pretty easy op, to give him an alternative urinary opening and you could be radical as possible with the tumour.

RE: Mass on the prepuce in a dog

Aine Seavers — Thu, 22 Aug 2019 03:48:58 GMT

Yep-totally agree esp the Staffie bit.

RE: Mass on the prepuce in a dog

Bob Russell — Wed, 21 Aug 2019 13:25:47 GMT

You can just do an impression smear from the lump. Should tell you if it is a mast cell tumour. A diff quik should give an almost instant diagnosis. Seems to be a favourite site for mast cell tumours and it is a staffie!!

RE: Mass on the prepuce in a dog

Aine Seavers — Wed, 21 Aug 2019 02:30:08 GMT

I would be worried this is a mast cell as we have had a few here on prepucal area and the licking is the warning sign. Don't let the owner railroad you into a hurried op. You need some basic diagnostics. Ypu could trial on some ranitidine and preds and z/d whilst you wait-if mast cell it will shrink right down and you may have better surgical options then as you have effectively debulked it. Read about mast cells on edge of surgical line not necessarily bad because they may not be malignant in the periphery. Whilst we are often aghast at the thought of penile amputation-the op is quite easy and the dogs do very well after as you have a primary single skin incison so keep your options open. I do have some great pics of a necrotic penis in a dog bound for 20hrs in bitch on heat-and then post op resection view. Dog did so well so quickly but this site won't let me upload them

RE: Mass on the prepuce in a dog

Alistair Graham-Evans — Tue, 20 Aug 2019 23:50:59 GMT

I would FNA it - not too late if de-bulked. You can diff quick and get an idea or even diagnosis yourself for a minimal price. Will enable a cunning plan.

RE: Mass on the prepuce in a dog

Joyce Whitehead — Tue, 20 Aug 2019 20:35:50 GMT

Yes I would agree histo would be needed before any decision made, sorry I forgot to put that in my previous post. But if it is extensive it may still be that the only possible way to remove all of it would be very extensive surgery.

As an N=1 I’ve seen a mast cell tumour in a scrotum before.

RE: Mass on the prepuce in a dog

Beats — Tue, 20 Aug 2019 20:11:45 GMT

Hi Katarina, a Y or Z plasty is rarely the answer for anything in my limited experience. I'm not sure what I would have done. Can you colour in a rough picture of a dog to show where the mass was and its extent, I'm not great at understanding from words alone. If You have the lump and haven't fixed it in formalin, you could press a microscope slide on it (after drying with blue roll), or scrape a few cells off with a scalpel and take a photo or few down microscope and we could see if mass type was identifiable if you posted the photos.

RE: Mass on the prepuce in a dog

Dinu Catilina — Tue, 20 Aug 2019 19:56:13 GMT

Hi Katarina, I would have considered a transposition skin flap. Something like this, but translating the flap medially not laterally:

http://vdt.ugent.be/sites/default/files/art77209.pdf

But I wouldn't remove a preputial mass without FNA or biopsy first.

RE: Mass on the prepuce in a dog

Katarina Lakatova — Tue, 20 Aug 2019 19:10:54 GMT

No Joyce , he was castrated 10 years ago.

RE: Mass on the prepuce in a dog

Joyce Whitehead — Tue, 20 Aug 2019 18:55:49 GMT

Is this an entire dog Katarina? I would be suspicious of what we used to call anal adenoma, or hepatoid adenoma. These can occur on/in preputial skin. I’ve got a patient with a huge mass. Complex story as owner refused surgery when it was removable, the dog copes remarkably well with it but it is chronically ulcerated. I did refer for advice to an oncologist, they said only truly effective surgery would be a preputial/penile obliteration with a resultant urethrsomy, effectively taking off a large amount of ventral abdomen skin. The owner didn’t want this so we manage him as best we can. He is a 13 year old lab so something else may get him before the mass stops him enjoying life.