Corneal squamous cell carcinoma in a dog: what to know

Squamous cell carcinoma is a cancer arising from surface cells. In a dog, a lesion may appear on the cornea, the eyelid, or the surrounding conjunctival tissue, so the exact location matters. Redness, a cloudy area, a raised mass, discharge, squinting, or rubbing can have several causes and do not establish cancer on their own. A veterinarian may examine the eye with magnification and stain, assess the rest of the eye, and recommend sampling or removal for a definite diagnosis.

Arrange a veterinary appointment promptly, especially when the lesion is growing or the eye seems painful. Prevent rubbing with an appropriate protective collar if advised, and do not use leftover human eye drops or steroid drops unless the veterinarian prescribed them for this episode. Treatment depends on size, depth, position, and whether the growth can be removed while preserving the eye. Discussions may include excision, specialised eye surgery, or referral to a veterinary ophthalmologist. General information about Squamous Cell Carcinoma, Surgical Excision, Mohs Surgery, and Skin Cancer Surgery can help you prepare questions, although human treatment pages do not replace veterinary care.

Seek same-day veterinary help for marked squinting, sudden vision difficulty, a rapidly enlarging mass, bleeding, severe swelling, a blue or white cornea, or repeated pawing at the eye. Eye problems can worsen through scratching or inflammation even before the cause is known.

Ask where the lesion starts, whether the cornea is involved, how the diagnosis will be confirmed, whether a sample is needed, and which treatment protects comfort and vision. Also ask about pain control, referral options, follow-up examinations, and signs that should trigger an earlier return.