Treatment of Skin Lesions with 5% 5-Fluorouracil
Standard Treatment Regimens by Indication
- The British Association of Dermatologists recommends applying 5% 5-fluorouracil cream once or twice daily for 3-4 weeks, repeated if required, for squamous cell carcinoma in situ (Bowen's disease) 1, 2
- Applying 5% 5-fluorouracil cream once daily for 1 week, then twice daily for 3 weeks, achieved an 83% complete response at 3 months in a large European multicentre RCT for squamous cell carcinoma in situ (Bowen's disease) 1, 2
- Treatment may be repeated at 6 weeks if clinically indicated for squamous cell carcinoma in situ (Bowen's disease) 3
- Twice daily application of 5% 5-fluorouracil cream for up to 9 weeks resulted in only an 8% recurrence rate at long-term follow-up for squamous cell carcinoma in situ (Bowen's disease) 3
Key Clinical Considerations
- Variable treatment periods, typically 3-4 weeks, have been used in studies for squamous cell carcinoma in situ (Bowen's disease) 2, 3
- Twice daily application of 5% 5-fluorouracil cream for 4-5 weeks is recommended for erythroplasia of Queyrat (penile lesions), though inflammation frequently limits this regimen 3, 4
- Less aggressive regimens, such as twice daily application on 1 day per week for 12 weeks, provide disease control but not cure for squamous cell carcinoma in situ (Bowen's disease) 3
Site-Specific Considerations
- Lower leg lesions in elderly patients may require observation rather than treatment due to poor healing potential 1, 2
- Facial lesions typically use the standard 3-4 week regimen of 5% 5-fluorouracil cream 1, 2
- Digital and nail bed lesions are generally fair to poor choices for 5-FU treatment 1, 2