Bowen’s Disease (SCC In Situ) – Early Diagnosis & Treatment in London

Understanding Bowen’s disease

Bowen’s disease, also known as squamous cell carcinoma in situ, is an early form of skin cancer confined to the epidermis, the outermost layer of skin. It develops slowly and often appears as a persistent, scaly red patch that does not heal. Because the abnormal cells remain superficial, Bowen’s disease is not life-threatening at this stage. However, if left untreated, there is a risk that the disease will progress into invasive squamous cell carcinoma, a more serious form of skin cancer.

Early recognition and treatment are essential. With proper management, most people achieve complete clearance and excellent outcomes. At Skinhorizon, our team is experienced in distinguishing Bowen’s disease from other red scaly conditions, such as eczema or psoriasis, ensuring you receive the right diagnosis and care.

Causes and risk factors

The main risk factor for Bowen’s disease is cumulative sun exposure, especially in fair-skinned individuals. Ultraviolet (UV) damage causes mutations in skin cells over time, which can lead to precancerous changes. Other contributing factors include:

• Age: more common in those over 50.
• Skin type: lighter skin tones are at higher risk.
• Immunosuppression: people with weakened immune systems (for example, after organ transplantation) are more vulnerable.
• HPV infection: Bowen’s disease on genital skin may be linked to human papillomavirus.
• Arsenic exposure: historic or occupational exposure increases risk.

Signs and symptoms

Bowen’s disease typically appears as a slowly enlarging, well-defined red patch, often with a scaly or crusty surface. The patch may itch, bleed slightly, or become sore, but many patients notice no discomfort. Common sites include the lower legs, trunk, scalp, and sun-exposed areas, although it can occur anywhere on the body. Unlike eczema or fungal infections, Bowen’s disease persists despite moisturisers or antifungal creams.

Diagnosis

Diagnosis usually begins with a detailed skin examination by a dermatologist. Dermoscopy may show irregular vascular patterns and scale, raising suspicion. Because Bowen’s disease can mimic other inflammatory skin conditions, a skin biopsy is often required to confirm the diagnosis. Histology demonstrates atypical squamous cells confined to the epidermis, confirming squamous cell carcinoma in situ.

Treatment options

The choice of treatment depends on lesion size, site, patient preference, and medical history. Common treatments include:

• Cryotherapy: freezing the lesion with liquid nitrogen to destroy abnormal cells.
• Topical therapies: creams such as 5-fluorouracil or imiquimod applied for several weeks to stimulate clearance.
• Photodynamic therapy (PDT): a photosensitising cream plus controlled light exposure to selectively destroy abnormal cells.
• Surgical excision: complete removal, providing definitive treatment and histological confirmation.
• Laser therapy: less common, but may be used in selected superficial cases.

At Skinhorizon, we explain each option, its success rates, side-effects, and cosmetic outcomes, so you can make an informed choice. Excision remains the gold standard where feasible, but non-surgical options may be equally effective for selected lesions.

Aftercare and recovery

Recovery varies depending on the treatment method. Cryotherapy may leave temporary blistering or hypopigmentation. Topical treatments can cause redness, irritation, and crusting during the course but usually heal with good cosmetic results. Photodynamic therapy may produce a sunburn-like reaction lasting a few days. Surgical excision requires wound care and stitches, with a small scar that fades over time. We provide personalised aftercare instructions to optimise healing and comfort.

Prevention

Preventive strategies include protecting your skin from UV damage by using broad-spectrum sunscreens, wearing protective clothing, and avoiding tanning beds. Regular skin checks, either self-examination or by a dermatologist, help detect early lesions before they progress. Patients with a history of Bowen’s disease should have ongoing surveillance, as they may be at higher risk for additional precancerous or cancerous lesions.

Special considerations

In immunocompromised individuals, Bowen’s disease may be more aggressive or recur more often, making close follow-up essential. Lesions on genital skin or under nails can be challenging to diagnose and may require specialist techniques. For skin of colour, erythema may be less obvious, so careful assessment is needed. Our clinicians are experienced in recognising Bowen’s disease across all skin types and sites.

Setting expectations

With early treatment, Bowen’s disease is highly curable. Most patients achieve clearance with minimal long-term effects. Some treatments may need more than one session, and recurrence can occur, especially in high-risk groups. We will guide you on realistic outcomes and how to monitor your skin after treatment.

Why choose Skinhorizon?

At Skinhorizon, you benefit from consultant-led assessment and evidence-based treatment. We provide high-quality advanced dermatology and aesthetic services with a strong emphasis on safety and patient comfort. Our integrated approach means we consider both medical effectiveness and cosmetic outcomes, ensuring confidence and peace of mind throughout your care journey.

Your first visit — what to expect

1. Consultation: review of your skin history and concerns.
2. Examination: dermoscopic assessment of the lesion and surrounding skin.
3. Biopsy (if needed): small tissue sample for accurate diagnosis.
4. Treatment discussion: explanation of available therapies tailored to your needs.
5. Aftercare guidance: personalised instructions to support recovery and prevention.
6. Follow-up: review to ensure clearance and monitor for recurrence.

Reviewed by: Dr Mohammad Ghazavi, Consultant Dermatologist
Skinhorizon Clinic, 4 Clarendon Terrace, Maida Vale, London W9 1BZ
Last reviewed: 20 August 2025