What should you know about equine squamous cell carcinoma?

In a horse, this cancer may appear as a persistent growth, ulcer, crusted area or non-healing wound, often on lightly pigmented or sun-exposed skin and around the eye or other mucosal sites. A veterinarian usually needs to examine the lesion and may take a biopsy. Human skin changes after contact with an affected animal are a separate clinical question: a lump, sore or scaly patch needs assessment on its own and cannot be identified from the horse’s diagnosis.

Arrange veterinary assessment for a suspicious lesion and follow instructions about handling, dressings and equipment. Wash hands after contact and avoid touching your own face or broken skin during care. If you develop a persistent sore, crust, bleeding spot or changing growth, book a dermatology examination. Depending on the findings, treatment options may include [Surgical Excision](/treatments/surgical-dermatology/excisional-surgery/), [Mohs Surgery](/treatments/surgical-dermatology/mohs-surgery/) or other [Skin Cancer Surgery](/treatments/surgical-dermatology/skin-cancer-surgery/).

Seek prompt care for a human lesion that bleeds repeatedly, grows, ulcerates, becomes painful, changes quickly, or appears near the eye, lip or another sensitive site. Urgent assessment is also sensible when redness, warmth, swelling or discharge suggests infection. Learn more about [Squamous Cell Carcinoma](/conditions/squamous-cell-carcinoma/) before comparing descriptions online.

Does my skin change need a biopsy? Could it be an infection, irritation or another growth? If cancer is confirmed, which procedure fits its depth, site and edges, and how will the area be monitored afterward?