MCT in a cat

RE: MCT in a cat

Richard Carter — Mon, 26 Sep 2022 08:24:19 GMT

The main supply to pinna is anterior and caudal and cutaneous- if the tumour confined to the lateral wall, do you think you going to reach? I would pretreat with dexafort about 3 days before, isolate the tumour with clamp into the vertical ear canal and use the outer edge of the clamp as my guide if that is possible. If the tumour much bigger, then a vertical incision about 3-4 mm margin though skin and subcut tissue to cartilage level, then try work out if sufficient healthy tissue between tumour and cartilage to try scrape off or if the tumour extends to cartilage, to do lateral wall resection. Might find cautery will help if you have it. I would also do in house smear of incision edge.

Think my other concern would be if this is a secondary tumour

RE: MCT in a cat

Tomas B — Sun, 25 Sep 2022 10:19:09 GMT

Thank you Richard. When you say shrinkage do you mean steroids?

Thinking about the anatomy of the ear, my concern is to have a good amount of cartilage to keep the ear in position but also not affect its vascularization in order to prevent pinnae necrosis. What do you reckon?

RE: MCT in a cat

Richard Carter — Sun, 25 Sep 2022 09:53:43 GMT

As mentioned by Beats, cat mct behave differently but skin can be secondary. Think I would try shrink pre-op, take fairly narrow margins but also take the lateral wall cartilage to get a physical barrier, try save pinna and then check for margins with cotton bud and in house microscopy on cut edges. Could you remove by clamping either side and using the clamps as a guide so not going to handle the tumour?The skin ones I’ve seen tend to look more like canine histiocytosis with multiple small circular raised nodule masses across the body so no surgery been contemplated. The other feline mct seen have been solitary masses in gut that did very well post surgery.

Also not an expert!

RE: MCT in a cat

Beats — Sat, 24 Sep 2022 16:45:48 GMT

i'm no expert.

My memory is that MCT's in cats tend to have a more benign behaviour in general?

I would likely try to remove withat least some level of margin (but not big margins, say 1cm?) - and this could mean taking the pinna away and perhaps lateral portion of ear canal if needed?

Alternatively, could remove with narrow margins if that is easier to do and with less risk of problems from surgery and then do more if does recur?

The pictures are good, but I think it is hard to know for sure what I would do without feeling it also. I would lean towards getting some level of margin and would not worry if that meant removing the pinna and bit of ear canal as long as this was not oging to lead to problems afterwards for cat.