Vulval intraepithelial neoplasia (VIN)

This leaflet provides essential information about vulval intraepithelial neoplasia (VIN), including its nature, causes, diagnosis, treatment options, and self-care advice.

What is VIN?

• VIN affects the skin of the vulva, the outer female genital area.
• It involves abnormal growth of top-layer skin cells, which can be precancerous but is not cancer itself.
• If untreated, VIN may develop into vulval cancer, but the risk is generally low (less than 5%).

Causes and Types

• Two main types: usual (uVIN) and differentiated (dVIN).
• uVIN mainly affects women under 50, linked to HPV (types 16 and 18), smoking, and low immunity.
• dVIN is rarer, often associated with other skin conditions or nearby vulval cancer, with a higher chance of progressing to cancer.
• VIN is not hereditary.

Symptoms and Diagnosis

• Symptoms vary: itching, soreness, pain, or sometimes no symptoms.
• Changes in skin color or texture may occur.
• Diagnosis involves vulvoscopy and biopsy, with tissue examined microscopically.

Treatment and Management

• VIN can be cured, especially if limited to a single patch.
• Treatments include surgery, laser ablation, topical therapies (imiquimod, cidofovir, 5-fluorouracil), or symptom management.
• Multiple areas or extensive VIN may require repeated treatments.
• No treatment may be chosen for mild cases, with regular monitoring instead.

Self-Care and Prevention

• Regular vulval skin checks are important.
• HPV vaccination may reduce future uVIN risk.
• Smoking cessation and gentle skin care (avoiding irritants, wearing loose clothing, using emollients) help prevent irritation.
• Emollients should be used cautiously due to fire risk near flames.

Additional Resources

• Support groups and reputable websites are available for further information.
• Always consult a healthcare professional for concerns or changes in symptoms.