Oral squamous cell carcinoma in cats: symptoms, causes and treatment

The aggressive nature of oral squamous cell carcinoma makes treatment difficult in cats:

• Surgery is possible only at an early stage and for small tumours.
• Radiotherapy is sometimes used to slow tumour growth.
• Chemotherapy is generally poorly effective in cats.
• Symptom-relieving care, including pain relief, feeding support and nursing, helps the cat feel more comfortable.

Surgical suitability is not decided by the visible tumour's size alone. Location, spread into bone or tongue and the possibility of obtaining adequate margins are crucial. Extensive operations have been performed in selected cases, but are not suitable for every cat. Recovery and subsequent feeding must be planned before the decision.

Extensive surgery involving the jaw and tongue may require a permanent feeding tube and demanding home care. Small patient series have reported prolonged benefits, but also serious complications. These results in selected patients are not a promise of prognosis for an ordinary oral cancer patient.

Aims of radiotherapy and drug treatment

Radiotherapy may aim to control local growth or relieve symptoms. The plan depends partly on whether the tumour has been removed or remains in place. Treatment may irritate oral tissues, so pain relief and nutrition are monitored at the same time. Chemotherapy or other cancer medicines do not generally eliminate the tumour on their own; any benefit is weighed against adverse effects and the cat's function.

Supporting feeding and medication

Symptom-relieving, or palliative, care is active treatment even when the tumour cannot be cured. It may include pain control using several approaches, nausea management and feeding support. If giving medicines by mouth causes pain, the route or treatment plan is changed with the vet.

A feeding tube may allow food and some medicines to bypass the painful mouth. It does not, however, remove tumour pain. The tube type and suitable food are chosen individually, and you are taught how to use it. Report blockage, dislodgement or inflammation of the insertion site to the practice; do not push the tube back yourself.

Do not use syringe feeding or rub food onto the paws to force a resisting cat to eat. This may worsen pain, food aversion and stress. Inadequate nutrition is addressed through a care plan. Pain relief is assessed even in a cat eating soft food, because eating alone does not establish that the mouth is pain-free.

Monitoring quality of life

Record whether your cat can rest, groom, eat or receive tube feeding calmly, and interact with familiar people. Also monitor drooling, bleeding and weight trends. The burden of treatment and the cat's willingness to accept medication form part of the overall assessment, alongside tumour measurements.

Agree in advance what to do if pain worsens, swallowing becomes difficult or home care is no longer manageable. If suffering cannot be relieved sufficiently, discuss euthanasia with the vet too. The decision does not need to wait until your cat can no longer move or breathe normally at all.

Unfortunately, the prognosis is usually poor.

Prognosis varies with location, extent, achievable surgical margins and treatment response. Good symptom control can improve the quality of the time remaining even if it does not stop the tumour. Check-ups assess both the local situation and whether the cat continues to benefit from the chosen treatment.