My name is ***** ***** I am an experienced small animal veterinary surgeon, I will be very pleased to work with you today and I will try my best to answer to your question to your satisfaction.
The short answer here is no, a cat scratch to the nose of a dog could produce an area of infection but there would be no possible link to malignant cancers. Can you tell me a little more about what happened?
About nine months ago our cat scratched a visiting dog in self defence, we are now being told that this has resulted in a malignant melanoma which means part (if not all) of the dogs soft nose tissue is to be removed in an effort to save it.
Could the scratch be responsible for what has happened even though Vetrinary help was given at the time???
I am sorry to hear about this dog's problem but malignant cancers do not start like this. It is highly likely that the malignant melanoma would have occurred in any case, cat scratch or no cat scratch
Could the bite have caused this but not be a 'malignant melanoma?
A cat scratch or cat bite could cause an area of erosion purely because of infection, this would be particularly true with some very aggressive bacteria but this would not be a cancer ...
But as far as malignant melanoma in dogs go, we just do not know the cause ...
OK, I think the vetrinary tratment was not given for some weeks after the incident so maybe the delay has contributed in some way - thanks very much for your guidance
An area of infection would have occurred just after the bite or scratch incident. If symptoms started nin emonths later I cannot see how this can be connected with your cat in any way ...