Squamous Cell Carcinoma in Goats

Squamous cell carcinoma, often shortened to SCC, is a malignant tumor that starts in squamous cells, the flat cells that make up the outer layer of skin and some body surfaces. In goats, this cancer usually begins as a local skin lesion and may look mild at first. Over time, it can become ulcerated, invasive, and difficult to fully remove.

In goats, SCC is reported most often in females, especially on the perineal and vulvar regions and on the skin of the teats and udder. Both males and females can also develop sun-induced tumors on the ears. Angora goats appear to be at higher risk, and Saanen goats have been reported with udder SCC associated with papillomas.

This cancer often spreads locally before it spreads far away. That means the tumor may invade nearby skin and deeper tissue, causing pain, discharge, bleeding, fly strike risk, and trouble nursing or breeding depending on location. Because SCC can start as a small crusted sore, pet parents sometimes mistake it for trauma, infection, or a wound that will heal on its own.

The good news is that early lesions may leave your vet with more treatment options. A prompt exam matters, especially if the lesion is on the udder, teat, vulva, or ear and has not healed within a couple of weeks.

SCC develops when squamous cells in the skin become cancerous. In goats, sun exposure appears to play an important role for some tumors, especially those on the ears and other lightly haired areas. Chronic ultraviolet damage is a well-recognized driver of SCC across species, and Merck notes that both male and female goats can develop sun-induced tumors on the ears.

Risk is not the same for every goat. Angora goats are reported to be at higher risk, likely because of skin and hair-coat factors that leave some areas more vulnerable. Females are affected more often overall because SCC in goats commonly involves the vulva, perineal region, teats, and udder. In Saanen goats, udder SCC has been reported in association with papillomas, suggesting that chronic skin change or irritation may contribute in some cases.

Age may also matter. Like many cancers, SCC is seen more often in older animals because abnormal cell damage builds over time. Chronic irritation, repeated trauma, poor healing, and persistent inflammation may also increase concern around any lesion, even though they do not automatically mean cancer.

This is not something a pet parent can diagnose by appearance alone. A sore that looks like infection, a wart, or a wound can still turn out to be SCC, which is why your vet may recommend a biopsy instead of continued watchful waiting.

Diagnosis starts with a hands-on exam and a careful look at the lesion's location, size, depth, and whether nearby tissue seems involved. Your vet will also ask how long the lesion has been present, whether it has changed, and whether the goat has had sun exposure, chronic irritation, or previous treatment.

A biopsy with histopathology is usually the most reliable way to confirm SCC. Cytology from a needle sample may help in some cases, but skin cancers are often best classified by tissue biopsy reviewed by a veterinary pathologist. Your vet may also evaluate whether the mass appears fully movable or fixed to deeper tissue, because SCC can invade locally.

If the lesion is large, recurrent, or in a difficult location such as the udder or vulva, your vet may recommend additional staging before treatment. This can include bloodwork, lymph node assessment, and sometimes imaging such as ultrasound or radiographs to look for deeper extension or less common spread.

Getting a diagnosis early matters. Smaller tumors are often easier to remove with cleaner margins, while delayed diagnosis can limit options and increase the chance of recurrence after treatment.

Not every case can be prevented, but you can lower risk by reducing chronic sun exposure and catching suspicious lesions early. Goats with light skin, sparse hair, or vulnerable ear and udder skin may benefit from access to shade during peak sun hours. This matters most in sunny climates and at higher elevations, where ultraviolet exposure can be more intense.

Routine hands-on checks are one of the most practical prevention tools. Look over the ears, udder, teats, vulva, and perineal area for crusts, ulcers, bleeding spots, or masses that do not heal. Early SCC can resemble a minor wound, so a lesion that persists for more than a couple of weeks deserves a veterinary exam.

Good skin health also matters. Work with your vet to address chronic irritation, papilloma-like growths, repeated trauma, and fly problems before they become long-term inflammatory issues. Keeping bedding, fencing, and milking areas as low-trauma as possible may help reduce repeated skin injury.

If your goat has already had SCC, ongoing rechecks are important because local recurrence can happen when cancer cells remain at the site. Your vet can help you decide how often to monitor and whether any herd mates have similar risk factors that deserve closer observation.