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Keloid Scars: Radiation Therapy

October 20 / 2026

keloid scar with radiotherapy

Keloid scars are a type of raised scar resulting from excessive tissue growth beyond the original wound boundaries, typically due to overproduction of collagen during healing.

Radiation Therapy for Keloid Scars

This treatment involves surgical excision of the keloid, followed by targeted radiation therapy to the scar area. Radiation aims to inhibit abnormal tissue growth and is typically administered in 1 to 3 sessions, commencing within 24 hours post-surgery for optimal recurrence prevention.

Ideal Candidates for Radiation Therapy

Consider radiation for:

Keloid scars that have recurred after previous surgical removal.
Scars causing pain or functional impairment.
Keloids formed after Cesarean section.
Scars in areas prone to keloid formation, such as the chest, shoulders, or highly tensed skin regions.

Planning and Radiation Procedure

1. Treatment Planning (CT Simulation)

The radiation oncology team will create a simulated image of the scar area using a CT scan to design a personalized radiation plan. For complex scar shapes, custom radiation shields may be fabricated. (This phase typically takes 1-3 hours.)

2. Radiation Administration

Each session lasts approximately 15-30 minutes. The patient lies in a precise, pre-planned position. Radiation shields are applied, and skin markings are made. Radiation is delivered to the designated points, with subsequent sessions scheduled if additional radiation is required.

Potential Side Effects

1. Short-Term (within 2-3 weeks)

Skin irritation is common within the first 2-3 weeks post-treatment and usually resolves spontaneously. Patients may experience discomfort or irritation in the irradiated area, which gradually improves over approximately 6 weeks.

2. Long-Term (after 3 months)

Skin Discoloration: Over time, the treated skin may experience changes in pigmentation, resulting in hyperpigmentation (darkening) or hypopigmentation (lightening) compared to the surrounding areas.
Cancer Risk: While a serious concern, the long-term risk of radiation-induced cancer from this treatment is extremely low.

Post-Radiation Skin Care

Keep the surgical wound covered with a dressing and avoid touching the treated area.
Protect the treated area from wind and sunlight, which can exacerbate irritation. If sun exposure is unavoidable, use SPF 50 sunscreen and minimize exposure time.
Avoid clothing that may rub against the treated area.

The surgeon will schedule follow-up appointments for suture removal. During this period, diligently observe the scar for any abnormal changes or concerns, and promptly consult your surgeon for evaluation.

For More Information, Please Contact

4D Radiotherapy Center LINAC Center