Causes
A malignant tumour promoted by sun exposure (areas of pale, thinly haired skin). White cats are especially prone to it on the ears and nose.
Diagnosis
Biopsy of the lesion to confirm. Staging tests depending on the case.
Treatment
Surgery to remove the tumour (in cats the affected ear tips are sometimes amputated). Depending on the location, radiotherapy may be added. Early detection is key.
Prevention
Protect pale-skinned animals from the sun, provide shade, and monitor the ears and nose in white cats.

