CATS · Condition guide
Feline squamous cell carcinoma: real veterinary cases
Squamous cell carcinoma is the most common skin cancer in cats, and the most preventable: cutaneous SCC is overwhelmingly sun-induced and clusters on the hairless, lightly-pigmented parts of white or partly-white cats — the ear tips, nose, and eyelids. The progression is predictable: chronic redness → scaling → crusting that won't heal → erosion → invasive tumour. Catching it before invasion is the difference between a small surgical excision and ear amputation.
Oral squamous cell carcinoma is a separate, more aggressive form — fast-growing tumours under the tongue or in the jaw that often present late because cats hide oral pain. Prognosis for oral SCC is unfortunately poor. For early cutaneous SCC, treatment options include surgical excision (often pinnectomy — ear-tip removal), strontium-90 plesiotherapy, electrochemotherapy, and topical imiquimod. Sun avoidance and feline-safe sunscreen on at-risk cats is the only effective prevention.
What vets typically check for
- Biopsy or fine-needle aspirate of any non-healing lesion on at-risk sites in white/light-coated cats.
- Stage with regional lymph node aspirate; chest radiographs if invasive disease.
- Pinnectomy (surgical removal of ear tip) is curative for early SCC of the ear.
- Strontium-90 plesiotherapy or electrochemotherapy for non-resectable cutaneous SCC.
- Oral SCC: incisional biopsy, CT imaging, multimodal therapy via specialist referral.
Not a replacement for veterinary care. Use this to walk into the conversation prepared, not to self-diagnose.
Real cases from the veterinary literature
Peer-reviewed reports our semantic search surfaces for Squamous cell carcinoma in cats. Click into any case for the full abstract — or run a personalised search with your pet's exact details.
- Successful clinical remission of feline squamous cell carcinoma after electrochemotherapy as the sole therapeutic approach - a quadruple case report
Arquivo Brasileiro de Medicina Veterinária e Zootecnia · 2025 · BR
This study looked at four cats with squamous cell carcinoma, a type of skin cancer that often appears on the face and can be hard to treat. The cats were treated with electrochemotherapy, which involves using electricity to help a chemotherapy drug work better. All four cats had facial lesions but did not have any spread of the cancer to their bones or other parts of the body.
- Electrochemotherapy is effective in the treatment of early-stage feline cutaneous squamous cell carcinoma
Journal of Feline Medicine and Surgery · 2025 · GB
This study looked at a treatment called electrochemotherapy (ECT) for cats with early-stage skin cancer known as cutaneous squamous cell carcinoma (cSCC). The researchers treated 23 cats, mostly with tumors on their noses, using a combination of a chemotherapy drug called bleomycin and electric pulses to enhance the treatment's effectiveness. After following up for about 136 da
- Electrochemotherapy with intravenous bleomycin injection: an observational study in superficial squamous cell carcinoma in cats.
Journal of feline medicine and surgery · 2014 · United States
This study looked at how well a treatment called electrochemotherapy (ECT) with a drug called bleomycin works for cats with superficial squamous cell carcinoma (SCC), a type of skin cancer. Over a few years, 11 cats with 17 SCC nodules in different stages were treated, mostly on their noses and ears. The results showed that 81.8% of the cats and 87.5% of the nodules responded c
- Electrochemotherapy for the treatment of squamous cell carcinoma in cats: a preliminary report.
Veterinary journal (London, England : 1997) · 2009 · Italy
Squamous cell carcinoma (SCC), a type of skin cancer, is fairly common in cats, especially those exposed to the sun. In a study involving nine cats with SCC, researchers used a treatment called electrochemotherapy, which combines a medication called bleomycin with electric pulses to help the medicine work better. Each cat received two treatment sessions a week apart, and the si
Frequently asked questions
- How do I prevent it?
- Keep at-risk cats (white, partly white, or pink-skinned) indoors during peak sun (10am-4pm), or apply feline-safe (zinc-free) sunscreen to ear tips and nose. Any crusty or non-healing lesion on a white cat's ear, nose, or eyelid deserves a biopsy before it becomes invasive.
- What's the difference between cutaneous and oral SCC?
- Cutaneous SCC on white cats' ears or nose is sun-induced, slow to spread, and curable if caught early. Oral SCC — in the jaw or under the tongue — is unrelated to UV, aggressive, often metastasises locally, and has a much poorer prognosis. Drooling, weight loss, or a visible mass in a cat's mouth warrants urgent investigation.
- Will pinnectomy bother my cat?
- Cats tolerate ear-tip removal remarkably well — most are back to normal behaviour within days. The cosmetic change is minor and the procedure is genuinely curative for non-invasive SCC of the pinna.