Mohs Surgery vs Superficial Radiation: What the 2025 Review Found

Short answer: A 2025 systematic review estimated lower local recurrence after Mohs micrographic surgery than after superficial radiation therapy. Mohs remains the guideline-preferred choice for many people who can undergo surgery. Radiation remains an established alternative in selected situations.

What did the review find?

Researchers combined nine superficial-radiation studies with 7,809 skin cancers and 17 Mohs studies with 10,247 cancers. Estimated local recurrence was:

• 1.9% after Mohs surgery
• 6.3% after superficial radiation

Those pooled numbers are useful but are not a head-to-head randomized result. Patients selected for radiation may have been older, less medically fit, or treated for lesions that differed in size, location, or risk.

Why is Mohs often preferred?

Mohs removes thin tissue layers and checks the full surgical margin during the procedure. It offers:

• immediate confirmation that examined margins are clear;
• tissue preservation in sensitive areas;
• strong long-term control data; and
• same-day planning for reconstruction in many cases.

Surgery also produces tissue that can reveal unexpected aggressive features.

When can superficial radiation make sense?

ASTRO guidance supports definitive radiation when a person cannot undergo surgery or declines it after understanding the alternatives. It may also be discussed when surgery could produce substantial functional or cosmetic impact.

Selection depends on:

• confirmed basal or squamous histology;
• tumor size, depth, subtype, and location;
• whether disease is recurrent;
• prior radiation;
• age and healing capacity; and
• ability to attend multiple appointments and long-term skin follow-up.

Different tradeoffs, not interchangeable procedures

Radiation avoids an incision and anesthesia, but it requires repeated visits and does not provide immediate margin confirmation. Skin reaction develops during treatment, and later pigment change, thinning, visible small vessels, or ulceration can occur.

Mohs involves a wound and possible reconstruction, but it usually completes tumor removal in one procedural day.

How to choose

A dermatologist, Mohs surgeon, and radiation oncologist may each contribute useful information. Ask how your lesion's risk category affects recurrence, what reconstruction would involve, which radiation technique is proposed, and how long the outcome evidence extends. A fair comparison should use evidence from similar tumors—not a single advertised “cure rate.”

Questions patients often ask

Is Mohs always better than radiation?

Mohs has stronger margin-controlled and long-term recurrence evidence for many operable tumors, but medical fitness, lesion location, reconstruction, patient preference, and prior treatment can make radiation reasonable.

Was the 2025 comparison randomized?

No. It pooled separate studies, so differences in patient and tumor selection may account for part of the recurrence difference.

Can radiation confirm clear margins?

No. Unlike Mohs surgery, radiation does not remove tissue for immediate microscopic margin examination.

Sources and further reading

1. Superficial Radiation Therapy versus Mohs Micrographic Surgery: A Systematic Review and Meta-Analysis. Dermatologic Surgery (2025).
2. ASTRO Guideline on Definitive and Postoperative Radiation Therapy for Basal and Squamous Cell Cancers. American Society for Radiation Oncology (2020).