Superficial Radiotherapy (SRT) – What Is It?

The alarming increase in the diagnosis of basal and squamous cell (non-melanoma) skin cancer is being called an epidemic. More than 5.4 million cases of non-melanoma skin cancers are treated in over 3.3 million people each year in the United States — 2.5 times more than all the other cancers combined. By 2020, experts predict that number will grow 50 percent to nearly six million — fueled by the Baby Boomer generation.

As the need for skin cancer treatment increases, Peraza Dermatology Group is focused on providing treatment solutions that treat cancer and maintain a desirable cosmetic outcome. Therefore, we are educating our patients on the SRT-100, which gives our patients a safe, effective and non-surgical approach to treating non-melanoma skin cancers.

Superficial Radiotherapy (SRT), a low-energy radiotherapy that penetrates only a short distance below the surface of the skin, is a highly effective, painless, and cosmetically attractive alternative to surgery for selected cancers and patients. The SRT-100™ is the most advanced choice for superficial radiotherapy available today. The treatment is painless and very similar to having an x-ray taken. Peraza Dermatology Group is the only dermatology practice in all of New Hampshire and Vermont and one of only two dermatologists in all of New England to have the Sensus Healthcare SRT-100TM.

Superficial Radiotherapy (SRT) is a low-energy radiotherapy that goes no deeper than the thickness of the skin. The radiation targets abnormal cells by disrupting cell division; tumor cells divide more rapidly than normal cells making the tumor an easy target for radiation. Normal cells are able to repair themselves because they are not going through this rapid growth making this form of surface radiation highly effective in treating non-melanoma skin cancers and a cosmetically attractive alternative to surgery in selected cancers and patient populations.


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Sensus Healthcare Clinical Photo 2 BCC on Nose
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Sensus Healthcare Clinical Photo 5 SCC on Lip


Why Choose SRT?

The SRT-100™ treats non-melanoma skin cancers found on the surface of the skin.  It can be used for lesions on the arms, legs, back and trunk, but is especially well-suited for skin cancers of the head and neck regions – the fold in the nose, eyelids, lips, corner of the mouth, and the lining of the ear – that would otherwise lead to a less than desirable cosmetic outcome. SRT is also a great treatment option for patients who are considered high risk for surgical procedures.

What to Expect:

  • The SRT procedure is non-surgical and does not require the use of anesthetics.
  • You will be required to attend multiple sessions, depending on your doctor’s recommendations.
  • The X-ray will be directed toward the lesion by placing an applicator cone over the targeted area
  • Once the treatment begins, it will take approximately 45 seconds to deliver the therapy.
  • The treatment is painless, but you will notice skin redness by the end of the first week’s treatment.
  • Post treatment, the skin will form a protective scab.  The new, healthy skin will develop underneath it.

Call our offices today to schedule an appointment.