cat with scabby lesions on pinnas

Re: cat with scabby lesions on pinnas

Kate Richardson — Sun, 08 Jun 2014 12:44:18 GMT

I take it all back and am eating humble pie as I type. I will be on the look out for it more now, so thanks for raising my awareness. That's what is so great about this forum!

Re: cat with scabby lesions on pinnas

Stephen Courtney — Sat, 07 Jun 2014 18:32:52 GMT

I've just diagnosed a new one this week too! Maybe it's getting more common. my new one seems to have been triggered by convenia given last November, and bizarrely both cefalexin and clav amoxy made the signs worse... so poss drug induced.

The picture you posted looked almost classical for PF to me...and i have never seen a case of dermatophytosis that looked like that - but again i almost never diagnose dermatophytosis .

Once had a run of 4 osteosarcomas in 2 weeks - since then just one or two a year.... there's no accounting for chance, I guess!

Re: cat with scabby lesions on pinnas

HMC — Sat, 07 Jun 2014 18:06:22 GMT

The biopsies gave the definitive diagnosis of [drum roll...] pemphigus foliaceus.

Re: cat with scabby lesions on pinnas

Glenn Hodgson — Sat, 10 May 2014 15:04:51 GMT

Could this be secondary infection to rabbit ear mites? Our old tom cat used to get these when he raided warrens. Big black crawly things, they would only be there for a few hours but drove him mad. used to paint fipronil onto his ears weekly in bunny season, did the trick.

Re: cat with scabby lesions on pinnas

Stephen Courtney — Fri, 09 May 2014 22:32:08 GMT

[quote user="Kate Richardson"]

Apologies Chris, I am just probably a bit over sensitive regarding rare causes of things as have had a run of colleagues seeming to test for the weird and wonderful before giving simple common treatments a chance to actually work!

I have never seen a case of pemphigus in 18 years- has anyone?

[/quote]

Several cases, actually, over about the same time period.

BUT I've only ever diagnosed 2 de novo cases of Cushings all by myself, in spite of looking hard, and one of those was my own dog!

I didn't think pemphigus was particularly rare in cats but clearly everyone else does....

Go figure....!

Re: cat with scabby lesions on pinnas

Bob Russell — Fri, 09 May 2014 16:19:20 GMT

Small practice here. Got two cases of pemphigus. not sure it is that uncommon!

Re: cat with scabby lesions on pinnas

HMC — Fri, 09 May 2014 16:12:59 GMT

Just had a reply from a dermatologist who also suggested pemphigus! I will however, wait for the culture results before doing biopsy I think. Thanks all. I'll try to remember to post the outcome.

Re: cat with scabby lesions on pinnas

Utlendigur — Fri, 09 May 2014 14:02:28 GMT

[quote user="Kate Richardson"]I have never seen a case of pemphigus in 18 years- has anyone?[/quote]

Yes - about a month ago! (so it sprang to mind) - and it looked exactly like the ear in the photo. I have got a picture of it at work I'll try to find and upload. Like Chris I was just suggesting it as a differential, not a definitive diagnosis.

Re: cat with scabby lesions on pinnas

Anonymous — Fri, 09 May 2014 10:46:08 GMT

no probs, just probably being a bit sensetive myself today.

I have had 1 cat with pemphigus. as well as my own dog with severe PF for 5 years pretty nasty. I seem to remember in cats it affected the ear pinnae but also the toes causing interdig crusting, confirmed on biopsy. Totally agree with you regarding treat the simple first.

Re: cat with scabby lesions on pinnas

Kate Richardson — Fri, 09 May 2014 10:27:34 GMT

I have never seen a case of pemphigus in 18 years- has anyone?

Re: cat with scabby lesions on pinnas

Anonymous — Fri, 09 May 2014 09:56:42 GMT

[quote user="Kate Richardson"]

[quote user="chris J"]

+1 for pemphigus, a biopsy would help but isnt always diagnostic.

[/quote]

Err what happened to common things being common.....?

[/quote]

I am suggesting that pemphigus is on the list as per other posts, I am very aware that common things occur commonly but simple tests have been done and awaiting results. just adding a differential to the list not suggesting that this is def pemphigus. of course we havent been told the age of the cat, drug history etc. Just suggesting if simple things arent coming to a conclusion or improving then biopsy would be worth looking at to check for various causes.

Re: cat with scabby lesions on pinnas

Kara Gibson — Fri, 09 May 2014 05:38:04 GMT

Looks very much like dermatophytosis to me, we see a lot of it here in Hong Kong and the pinnae are a favourite place. I'd wait for your culture results before next step biopsy.

Re: cat with scabby lesions on pinnas

Kate Richardson — Thu, 08 May 2014 18:05:17 GMT

[quote user="chris J"]

+1 for pemphigus, a biopsy would help but isnt always diagnostic.

[/quote]

Err what happened to common things being common.....?

Re: cat with scabby lesions on pinnas

Anonymous — Thu, 08 May 2014 15:03:47 GMT

+1 for pemphigus, a biopsy would help but isnt always diagnostic.

Re: cat with scabby lesions on pinnas

Braden Collins — Thu, 08 May 2014 14:43:28 GMT

I would consider insect hypersensitivity. Mosquitoes, midges or flies?

Re: cat with scabby lesions on pinnas

Utlendigur — Thu, 08 May 2014 14:00:29 GMT

Pemphigus?

Re: cat with scabby lesions on pinnas

Kate Richardson — Thu, 08 May 2014 12:18:26 GMT

Fungal or bacterial would be top of my list but as Martin says, wait for the test results, although if taking some time, some antibiotics in the mean time probably will do no harm, and there may be secondary infection due to self trauma anyway which will be pruritic in its own right

Re: cat with scabby lesions on pinnas

Martin Atkinson — Thu, 08 May 2014 09:29:00 GMT

Sit tight for the lab results, cow pox virus may be an outside bet but meanwhile if it is bilaterally symmetrical you probably need to be thinking autoimmune disease or food allergy. Solar dermatitis is a possibility but it is a dark coated cat and a bit too acute. Any lesions anywhere else especially paws? Any recent medication or vaccination, I saw something similar in a cat on Felimazole which resolved on withdrawal.