The objective of this study was to obtain long-term sustained clearance rates for subjects previously treated with imiquimod creams in studies GW01-0702, GW01-0703, GW01-0704 and GW01-0705.

This is a Phase 3 longitudinal and observational study. Subjects who previously enrolled in studies GW01-0702, GW01-0703, GW01-0704, and GW01-0705 and were completely cleared of their AK lesions in the selected treatment area at the end-of-study visit will return for follow-up visits at 6 and 12 months after the EOS visit or until a recurrence of AKs.

The NCT numbers for the above mentioned studies are:

NCT00603798 - for Studies GW01-0703 and GW01-0705

NCT00605176 for Studies GW01-0702 and GW01-0704

Inclusion Criteria:

• Are willing and able to give informed consent;
• Have successfully completed one of the following studies: GW01-0702, GW01- 0703, GW01-0704, or GW01-0705 and have been determined to be completely clear of AK lesions at the EOS visit in the designated treatment area from the previous study
• Are willing to participate in the study as an outpatient, make visits to the study center for follow-up evaluation, and agree to comply with all study requirements.

Exclusion Criteria:

• None. All subjects who meet the inclusion criteria above may participate.

The study population consisted of subjects who have been treated with imiquimod or with placebo in one of the aformentioned studies and who demonstrated complete clearance of all clinically visible or palpable AK lesions in the selected treatment area at the end-of-study visit.

12 months

All AEs that were ongoing or started in the previous treatment area at the end of Phase 3 study, or any AEs that occurred that were related to the previous Phase 3 study medication were recorded.