Dermatology

Patch Testing

Patch testing is used to investigate and confirm allergic contact dermatitis by identifying specific substances that trigger a skin reaction. Appropriately diluted allergens are applied to the skin, typically on the back, and remain in place for 48 hours. The tests are reviewed at 96 hours, as reactions often take 48–96 hours to appear.

Phototherapy

Phototherapy involves using controlled ultraviolet (UV) light to treat various skin conditions, including psoriasis, eczema, vitiligo, and pruritus. UVB light is delivered through specialised equipment, reducing inflammation and slowing abnormal skin cell growth. Treatments are typically administered three times weekly, under medical supervision, and are effective in managing chronic and treatment-resistant dermatoses.

Photodynamic Therapy

Photodynamic Therapy (PDT) treats pre-cancerous lesions (e.g., actinic keratoses) and superficial skin cancers. It involves applying a photosensitising agent to the skin, which is absorbed by abnormal cells. The area is then exposed to a specific light wavelength, activating the agent and destroying targeted cells. PDT is minimally invasive, with cosmetic benefits and a relatively short recovery time.

Cryotherapy

Cryotherapy involves using extreme cold, typically liquid nitrogen, to destroy abnormal or diseased skin tissue. It is commonly used to treat pre-cancerous conditions (e.g., actinic keratoses) and some superficial skin cancers. The procedure is quick, minimally invasive, and effective, promoting tissue destruction and subsequent healing through controlled freezing.

Common conditions treated

The Dermatology Department provides care to people with a wide variety of skin problems. The most common conditions we see relate to

• Melanoma and suspicious pigmented lesions
• Basal cell carcinoma
• Squamous cell carcinoma
• Psoriasis
• Acne
• Eczema
• Hidradenitis suppurativa
• Rosacea
• Alopecia
• Autoimmune and complex medical dermatology
• Acute dermatology presentations
• Skin infections