SRT for Skin Cancer: Effective Treatment with a Gentle Touch

If you've been diagnosed with a non-melanoma skin cancer, basal cell carcinoma or squamous cell carcinoma, your dermatologist may have mentioned superficial radiation therapy, or SRT. It's a treatment that's been around for decades but has seen a real resurgence in recent years, and for good reason. For the right patients, SRT offers a highly effective way to treat skin cancer with minimal disruption to daily life and a side effect profile that's genuinely hard to beat.

Here's what you need to know.

What Is SRT, Exactly?

Superficial radiation therapy uses low-energy X-rays to destroy cancer cells in the superficial layers of the skin. Unlike traditional deep-tissue radiation therapy, which is designed to penetrate well below the skin's surface, SRT delivers energy precisely where it's needed: right at the tumor, with minimal impact on the healthy tissue underneath.

The treatment is done in an outpatient setting. Patients typically come in for multiple short sessions over a few weeks, and each visit takes only a few minutes. No anesthesia. No recovery room. Many patients go right back to their normal routine the same day.

How It Compares to Traditional Radiation Therapy

Traditional radiation therapy (sometimes called external beam radiation or deep radiation therapy) was designed to treat tumors deep within the body, think lung cancer, prostate cancer, or brain tumors. When it's used for skin cancers, it's often overkill. The radiation penetrates far deeper than necessary, which means more exposure to underlying structures like bone, cartilage, and healthy tissue.

SRT, by contrast, is purpose-built for the skin. Its energy only penetrates a few millimeters, just deep enough to reach a skin tumor, not deep enough to affect anything beyond it. That precision is the key to its favorable side effect profile.

Think of it like using a scalpel versus a broadsword. Traditional radiation gets the job done, but SRT is designed for exactly this type of work.

Side Effects: What to Expect (and What You Won't Have to Worry About)

This is where SRT really shines. Because the radiation stays so superficial, the systemic side effects that patients often associate with radiation therapy, fatigue, nausea, damage to internal organs, simply don't apply. You're not radiating your lungs or your stomach. You're treating a spot on your skin.

During Treatment

The most common side effects during SRT are local and mild. The treated area may become:

• Red or irritated (similar to a sunburn)

• Slightly swollen or tender

• Dry or flaky

These reactions are a normal part of how the skin responds to radiation and are typically manageable with gentle skincare. Most patients experience only mild discomfort, if any.

After Treatment

Once the full course of treatment is complete, the treated skin goes through a healing process over several weeks. Some patients notice temporary changes in skin color (either lighter or darker) in the treated area, and in some cases this can be permanent. Hair loss at the site is also possible.

In rare cases, particularly with repeated treatments in the same area, there can be changes in skin texture over the long term. Your provider will discuss any specific risks based on your situation, the size of the tumor, and where it's located.

What You Won't Experience

With SRT, you won't face the side effects that come with surgical excision, no surgical wound to care for, no stitches, no scarring in the traditional sense, and no risk of surgical complications like infection or dehiscence. And unlike systemic therapies, there's no impact on your immune system, blood counts, or internal organs.

For patients on blood thinners, those with certain chronic conditions, or those in areas where surgery could be particularly challenging (the nose, ears, eyelids), this matters enormously.

Who Is a Good Candidate for SRT?

SRT is a particularly strong option for:

• Older adults who may not be ideal surgical candidates

• Patients on anticoagulants or with bleeding concerns

• Tumors in cosmetically sensitive areas like the face, where surgical scarring can be a concern

• Patients who prefer a non-surgical approach or have anxiety about procedures

• Larger tumors that would require extensive surgery

It works best for non-melanoma skin cancers, primarily basal cell carcinoma (BCC) and squamous cell carcinoma (SCC), that are located on or very near the skin surface. It is not appropriate for melanoma or for cancers that have spread to lymph nodes or deeper tissues.

The Effectiveness Question

A common concern is whether a less invasive treatment is as effective. The data here is reassuring. Multiple studies have shown cure rates for SRT that are comparable to surgical excision, in the range of 90–95% or higher for appropriately selected tumors. It's not a compromise treatment. It's a legitimate, guideline-supported option that dermatologists and radiation oncologists have used effectively for decades.

The Bottom Line

Non-melanoma skin cancer is highly treatable, and you have more options than you might realize. SRT offers a compelling combination: proven effectiveness, minimal systemic side effects, no surgery, and a treatment experience that fits into your daily life. For many patients, it's not just an alternative to surgery, it's the better choice.

If you've been diagnosed with a basal cell or squamous cell carcinoma and want to explore whether SRT is right for you, our team is here to help.

Call us today at (520) 382 - 3330 or click book now to schedule a consultation with our dermatology team, we'll walk you through your options and build a treatment plan that works for you.