Photo-therapy With a Topical Retinoid Versus Photo-therapy Alone for Actinic Keratoses

Exclusion Criteria

• •Subjects who are pregnant or lactating
• •Subjects with a history of cutaneous photosensitivity or porphyria, hypersensitivity to porphyrins, or photodermatosis
• •Subjects with use of photosensitizing drugs within 1 week of study start
• •Subjects with use of topical medications such as corticosteroids, alpha-hydroxyacids or retinoids 2 weeks before study entry
• •Subjects who received previous treatment of target AKs within 4 weeks
• •Subjects who are unable to understand the protocol or give informed consent