Photodynamic Therapy (PDT)
Photodynamic Therapy (PDT) Treatment
Photodynamic Therapy (PDT) Treatment Statistics and Key Information
- Patient Satisfaction Rate
- 95%
- Average Treatment Cost
- GBP 850
- Number of Reviews
- 854
- Treatment Downtime Duration
- Varies
- Number of Available Practitioners
- 42
Overview
Photodynamic Therapy (PDT) is a **medical treatment** that combines a *light-sensitive medicine* with a specific light source to destroy abnormal cells. A photosensitising agent (often a cream like methyl aminolevulinate or 5-ALA) is applied to the target area. After a period of incubation to let the drug accumulate in abnormal cells, a light (artificial red light or even daylight) is applied. The light activates the medicine, producing a chemical reaction that creates reactive oxygen species that damage and kill those abnormal cells while sparing much of the healthy surrounding skin. The agent and the light are harmless on their own but work together to treat the lesion. PDT is mostly used on **areas accessible to light**, such as the skin.
Goals of Photodynamic Therapy (PDT) treatment
- Destroy precancerous skin cells (actinic keratoses) to prevent progression to cancer.
- Treat **non-melanoma skin cancers** like superficial basal cell carcinoma and Bowen’s disease when surgery might cause more cosmetic issues.
- Reduce sun-damage over a broader area of skin (‘field cancerisation’) and improve cosmetic appearance of sun-damaged skin.
- Minimise scarring compared with surgery while controlling abnormal cell growth.
Treatment Options
- PDT is less invasive than **surgical excision** and often has better cosmetic results in delicate areas, but surgery may be more definitive for deeper lesions.
- Compared with **cryotherapy**, PDT might be more expensive but treats broader ‘field’ sun damage and offers smoother cosmetic outcomes.
- Other options like **topical chemotherapies** (5-FU, imiquimod) also treat superficial lesions but work differently and may have different side-effect profiles. PDT uses light activation to *selectively kill cells*.
- Lasers and more invasive techniques can penetrate deeper but often need longer downtime and carry different risks.
Pros
- It’s **minimally invasive** and often outpatient, so no general anaesthesia or big incisions.
- Healthy cells are mostly unaffected because the photosensitiser concentrates in abnormal cells.
- It tends to result in **better cosmetic outcomes** than surgery in sensitive areas (face/nose).
- Treatment can often be repeated if needed, and there’s usually minimal scarring when done properly.
Cons
- PDT only works for **superficial lesions** because light can’t penetrate deeply.
- It may be **more expensive** than simpler options like cryotherapy for some precancerous patches.
- Treatment can be **uncomfortable or painful** during light activation with sensations like burning or stinging.
- Not suitable for all skin cancers or deep cancers; alternatives may be needed.
Candidate & Preparation
Who is a Good Candidate
- Someone with **actinic keratoses** (pre-cancerous sun-damaged patches).
- People with **superficial basal cell carcinoma** or **Bowen’s disease** where surgery may affect appearance.
- Patients who want a tissue-sparing, less invasive option and are willing to follow sun-avoidance recommendations.
- Not suitable for **deep skin cancers** or lesions that can’t be reached by light due to thickness or location.
Appointments & Safety
What Happens During Appointment
A typical session involves cleaning the area, removing scales/crusts, applying the photosensitising cream and covering it for 3 hours to let it absorb. Then the cream is removed and a bright light is applied for about 10–30 minutes depending on size of the area. Appointments often include a prep and light phase and can take several hours including incubation time.
Pain Level
Some people feel **burning, stinging or warmth** while the light is on or afterward, but clinicians often manage discomfort with cooling sprays, breaks or anaesthetic options.
Safety Considerations
- PDT can cause **inflammation, redness and swelling** in the treated area — this is expected as part of the reaction.
- Photosensitiser makes skin very sensitive to light for at least 24–48 hours, so strict sun avoidance and sunscreen are critical.
- There’s a small risk of blistering, pigment changes, or scarring if aftercare isn’t followed.
- Eye protection is used during the light phase to prevent damage.
Cost & Access
Typical Prices
Private PDT prices vary a lot. For example, one dermatology clinic lists guide prices from about **GBP 850 for up to 3 lesions** and **GBP 1,150 or more for larger field treatments** per session, with repeat sessions usually required for certain conditions.
Why Prices Vary
- Size and number of sites being treated (more lesions often means more time and resources).
- Clinic location and overheads (London/major centres often cost more).
- Whether consultations, follow-ups, dressings and aftercare are included in the price.
- Type of PDT (conventional lamp/light vs daylight PDT) and whether anaesthetic or advanced light systems are used.
Results & Maintenance
How Long Results Last
For a single actinic keratosis treatment, results may be long-lasting if the lesion is resolved, but sun protection and regular skin checks are still needed because new lesions can develop over time. For superficial skin cancers, repeat cycles may be recommended and follow-up monitoring is standard to check for recurrence.
Maintenance Requirements
- For **actinic keratoses** and sun-damaged areas, multiple sessions are often used as one course, with possible retreatment if new lesions appear.
- For superficial skin cancers, protocols often involve two treatments spaced about a week apart.
- Regular skin checks are recommended to monitor for recurrence or new lesions rather than routine frequent PDT unless clinically indicated.
Regulation & Guidelines
Guidelines
There isn’t a single dedicated NICE guideline for all PDT use, but NICE has specifically assessed devices like Ambulight PDT for non-melanoma skin cancers. MHRA regulates the light devices and photosensitising medications used in PDT, and professional dermatology bodies provide clinical standards and evidence-based recommendations for how it should be used.
What to Do If Something Goes Wrong
Regulation
PDT is conducted under **medical governance** by dermatologists or oncologists and follows NHS and professional skin cancer treatment standards. Devices and medicines used are regulated by MHRA as medical devices and medications. NICE has assessed specific PDT equipment like Ambulight for use in the NHS.
Complaints
If something goes wrong, raise it with the clinic’s complaints process, your GP consultant or relevant professional regulator (e.g., General Medical Council) and local authority standards for safety.
