Mr. Onur Gilleard
Qualifications & Experience
Mr Onur Gilleard is a distinguished consultant plastic surgeon on the GMC specialist register. He previously held an NHS consultant post at St Bartholomew’s Hospital in London, specialising in skin cancer and microsurgical reconstruction. In 2021, Mr Gilleard transitioned from the NHS to dedicate himself fully to private practice, allowing him to focus exclusively on providing personalised, high-quality care to his patients. He is recognised as an expert in laser treatments, having conducted research and developed advanced treatment protocols using cutting-edge laser technology to optimise both clinical outcomes and cosmetic results.
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CO₂ Laser Keloid Scars: Identifying Risks and Safe Alternatives
Considering co2 laser keloid scars treatment requires understanding significant contraindications due to the inherent risk of exacerbating scar formation. Keloid scars result from dysfunctional wound healing, characterized by collagen overproduction and fibroblast dysfunction, causing them to extend beyond the original injury. This article clarifies the critical distinction between keloid and hypertrophic scarring, identifies key risk factors for keloid development, and outlines why CO₂ laser is generally unsuitable. It further explores expert-recommended safe scar management alternatives for individuals with a genetic predisposition or history of keloids.
London Skin Clinic specializes in consultant-led dermatological surgery and advanced laser aesthetics. Our expert team provides evidence-based guidance on complex scar management, ensuring patient safety and optimal outcomes through a highly specialized approach.
To explore your options, contact us to schedule your consultation. You can also reach us via: Schedule your Consultation
Understanding Keloid Scars: What Are They and Why Do They Form?
Keloid scars are a type of raised scar from an overly aggressive healing process. Unlike typical scars, they extend beyond the original skin injury, appearing as firm, rubbery lesions or shiny, fibrous nodules. Understanding their risk factors is essential before considering any treatment, as procedures like co2 laser keloid scars management are generally contraindicated.
Keloids vs. Hypertrophic Scars: A Key Distinction
Keloids are often confused with hypertrophic scars, but their clinical behaviour and treatment implications differ. A hypertrophic scar is also raised and red but remains within the initial wound’s borders, often flattening within 12 to 24 months.
Keloids, in contrast, grow invasively, expanding for months or years and rarely regressing without intervention. This growth beyond the original wound margin is the primary diagnostic feature.
View data as table
| Characteristic | Keloid Scar | Hypertrophic Scar |
|---|---|---|
| Growth Boundary | Grows beyond the original wound edges | Remains within the original wound boundaries |
| Progression | Can continue to grow over time; rarely regresses | Often improves and flattens within 1-2 years |
| Genetic Link | Strong genetic and ethnic predisposition | Less pronounced genetic link |
| Recurrence After Excision | High rate of recurrence if excised alone | Lower rate of recurrence after excision |
The Biology Behind Keloid Formation
Keloid development stems from a dysfunctional wound healing mechanism. After skin trauma, fibroblasts produce collagen to repair the damage. In individuals with a keloid predisposition, these fibroblasts behave abnormally, overproducing collagen and leading to a disorganized, thick buildup of collagen fibres.
The process is linked to altered levels of growth factors like Transforming Growth Factor-beta (TGF-β), which promotes fibroblast activity and collagen synthesis. The result is a scar that is structurally different and larger than necessary for wound repair.
Why CO₂ Laser and Keloids Don’t Mix: The Contraindication Explained
CO₂ laser resurfacing delivers controlled thermal energy into the skin, creating micro-injuries to stimulate healing and new collagen formation. While effective for atrophic acne scars or deep wrinkles, this mechanism can trigger a pathological response in individuals prone to keloids.
Keloid-prone skin can interpret the laser’s precise trauma as a new injury, triggering an aggressive healing cascade. A history of keloid formation is therefore a primary contraindication for CO₂ laser treatment.
The Mechanism: How CO₂ Laser Can Worsen Keloids
On skin with fibroblast dysfunction, the controlled injury from an ablative CO₂ laser can activate the cellular pathways that cause keloids. Instead of producing organized collagen, the fibroblasts become overactive. This leads to overproduction of disorganized collagen, forming a new keloid or enlarging an existing one.
The treatment intended to remodel scar tissue can instead stimulate a more significant, difficult-to-treat scar. A thorough patient history and physical examination by a consultant is a critical safety step.
The Risks of Treating Keloid-Prone Skin with Ablative Lasers
Treating keloid-prone skin with ablative lasers carries risks beyond a poor cosmetic outcome. Adverse effects include:
- New Keloid Formation: The laser treatment site can develop a new, often larger, keloid.
- Scar Enlargement: An existing scar targeted for revision may grow significantly larger and more raised.
- Increased Symptoms: The resulting keloid can be more painful, itchy, or tender than the original scar or lesion.
- Hyperpigmentation: The aggressive inflammatory response can lead to significant and persistent post-inflammatory hyperpigmentation (PIH), especially in darker skin types.
Given these risks, ablative lasers are not recommended for individuals with a known keloid tendency. The risk of worsening the condition outweighs any potential benefit.
Are You Prone to Keloids? Identifying Your Risk Factors
Determining your predisposition to keloid scarring is critical before any procedure involving controlled skin injury. A positive history for key risk factors requires discussion with a specialist. Evaluating co2 laser keloid scars risk is a fundamental part of our pre-treatment consultation.
Genetic and Ethnic Predispositions (Fitzpatrick Skin Types IV-VI)
Keloid formation has a strong genetic component. If close family members have keloids, your risk is significantly elevated. This predisposition is linked to ethnicity; individuals of African, Hispanic, and Asian descent are up to 15 times more likely to form keloids than Caucasians.
This corresponds with Fitzpatrick skin types IV, V, and VI (olive to dark brown and black skin tones). Though the exact genetic mechanism is unknown, this is a well-established clinical observation and a primary risk indicator.
Personal History of Abnormal Wound Healing
A personal history of keloids is the most reliable predictor of future formation. Common triggers include:
- Ear or Body Piercings: A common site for keloids, especially on the earlobes and cartilage.
- Acne: Severe cystic acne can lead to keloid formation on the chest, back, shoulders, and jawline.
- Surgical Incisions: Scars from past surgeries (e.g., C-section, appendectomy) that became raised and grew beyond the incision line.
- Vaccinations: The BCG vaccination site is a known trigger for keloids in susceptible individuals.
- Minor Cuts and Scratches: In highly predisposed individuals, even a small scratch can result in a keloid.
If you have ever developed a scar that was thick, raised, itchy, and grew larger than the original injury, you likely have a keloid-forming tendency.
Safe Scar Management: Expert Alternatives for Keloid Treatment
Safe management for individuals with a history of keloids requires evidence-based alternatives to ablative lasers. The goal is to control, not stimulate, the abnormal healing response. A consultant-led clinic can provide a tailored, multimodal approach.
Because no single treatment is universally effective, a comprehensive strategy is key. The focus is on reducing scar size, alleviating symptoms like pain and itching, and preventing recurrence. For a detailed overview of options, see our comprehensive guide to keloid removal.
Non-Laser Approaches: Steroid Injections and Cryotherapy
Intralesional Corticosteroid Injections: This is a first-line treatment for keloids. A corticosteroid, typically triamcinolone acetonide, is injected directly into the scar tissue. The steroid reduces inflammation, inhibits fibroblast activity, and breaks down excess collagen. Treatments every 4-6 weeks can significantly flatten and soften the scar.
Cryotherapy: This technique freezes the keloid with liquid nitrogen. The cold damages scar cells and restricts blood supply, causing it to shrink. Cryotherapy is effective for smaller keloids and can be combined with steroid injections to enhance results.
Surgical Excision with Adjuvant Therapies
Standalone surgical removal of a keloid has a high recurrence rate (45% to 100%), as the surgical trauma can trigger a larger keloid. Excision is therefore combined with adjuvant (post-operative) therapies to suppress the healing response and prevent recurrence.
Effective adjuvant strategies include corticosteroid injections into the incision site, starting immediately after surgery and continuing for months. This is an effective protocol for scars like those in ear keloid removal. This combination approach improves outcomes and is a cornerstone of keloid management.
The Importance of Specialist Consultation: A Consultant-Led Approach
Treating scars, especially with a history of keloids, requires medical expertise. Distinguishing between hypertrophic scars and keloids, assessing risk factors, and selecting a treatment plan require a thorough clinical evaluation. A consultant-led approach is paramount for patient safety and outcomes.
Why Expert Diagnosis is Non-Negotiable
An accurate diagnosis by a GMC-registered consultant plastic surgeon or dermatologist is foundational to safe treatment. These specialists can assess the scar, take a medical and family history, and correctly identify the scar type. An incorrect diagnosis could lead to inappropriate treatment, like using a CO₂ laser on a keloid, causing irreversible worsening.
This expert assessment ensures the recommended treatment is evidence-based and tailored to your clinical situation, minimizing risk and maximizing positive results.
View data as table
| Treatment Method | Recurrence Rate (Standalone) | Recurrence Rate (Combined Therapy) |
|---|---|---|
| Surgical Excision Only | 45-100% | N/A |
| Intralesional Steroids Only | 9-50% | N/A |
| Cryotherapy Only | 30-74% | N/A |
| Excision + Steroid Injections | N/A | <50% |
| Source: Data adapted from the British Association of Dermatologists’ guidelines for the management of keloid scars. Rates are approximate and vary by individual. | ||
Personalized Treatment Plans from Leading UK Specialists
At London Skin Clinic, patients are treated by consultant plastic surgeons and laser specialists like Prof. Jonny Herron and Mr. Onur Gilleard. Our approach is medical and personalized. We develop a treatment strategy based on your scar type, location, Fitzpatrick skin type, and personal wound healing history.
This consultant-led care ensures every patient receives a safe, effective treatment plan. For those predisposed to abnormal scarring, this expertise is a necessity.
Making Informed Decisions About Your Scar Treatment
Treating any scar requires careful consideration, especially for those prone to keloids. While CO₂ laser resurfacing is effective for some scars, it is not a universal solution. Understanding the high risk of using co2 laser keloid scars treatment is the first step toward finding a safer alternative.
Successful management requires an accurate diagnosis and a treatment plan that controls, not provokes, the skin’s healing response. This requires a consultation with a medical expert to assess your situation and recommend evidence-based options.
Conclusion
Your personal and genetic history of wound healing is the critical criterion for any scar revision procedure. If you suspect a tendency for keloid formation, avoid stimulatory treatments like ablative lasers. Instead, seek a formal diagnosis from a specialist to confirm the scar type and recommend a safe, evidence-based management plan, such as intralesional steroids or combination therapy with surgical excision.
For an expert assessment from a consultant plastic surgeon, contact us. Schedule your Consultation at our clinics in Harley Street, St Albans, or Guildford.
Frequently Asked Questions
What is the clinical difference between a hypertrophic scar and a true keloid?
The primary clinical difference is the scar’s boundary and behaviour over time. A hypertrophic scar is raised but remains strictly within the confines of the original injury and often flattens within 12-24 months. A keloid, however, grows invasively beyond the original wound’s borders into healthy surrounding skin and rarely resolves without specialist intervention.
How does the thermal energy from a CO₂ laser risk triggering a new keloid?
The CO₂ laser operates at a 10,600 nm wavelength, creating a controlled thermal injury to stimulate new collagen. In individuals with keloid tendencies, this specific stimulus can dysregulate fibroblast activity, leading to an excessive deposition of type I and III collagen. This process can unfortunately trigger the formation of a new, larger keloid scar instead of promoting controlled healing.
Does having a darker skin tone increase the risk of developing keloids after laser treatment?
Yes, there is a significant correlation. According to dermatological studies, individuals with Fitzpatrick skin types IV through VI are up to 15 times more likely to develop keloid scars. This genetic predisposition means that the controlled trauma from a laser creates a much higher risk of an abnormal healing response, making the procedure unsuitable for those with a personal or family history of keloids.
Why is using an ablative CO₂ laser to treat an existing keloid scar contraindicated?
Applying an ablative laser to an active keloid is strongly contraindicated as it introduces new trauma, which is the primary trigger for keloid growth. This can induce the Koebner phenomenon, where the treated keloid not only recurs but often becomes significantly larger. Standard-of-care treatments, as recommended by the British Association of Dermatologists, typically involve intralesional steroid injections, cryotherapy, or specialised surgical techniques.
If I have a mild keloid history, are non-ablative lasers a safer alternative?
While generally safer than fully ablative lasers, even non-ablative options carry a risk for keloid-prone skin. Lasers like the Pulsed Dye Laser (PDL) are sometimes used under strict specialist supervision to target redness in early scars, not for textural resurfacing. For any patient with a confirmed history, our consultant-led approach at the London Skin Clinic prioritises non-traumatic treatments to avoid triggering a scarring response.
What specific signs during a consultation indicate a high risk for co2 laser keloid scars?
During your assessment, our consultant surgeons look for key indicators beyond a simple verbal history. These include existing keloids on high-tension areas like the chest, shoulders, and earlobes, a close family history of keloiding, and a personal history of raised scars forming from minor trauma like acne or piercings. These factors together create a risk profile that would make you an unsuitable candidate for this procedure.
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