LAS41005 in Hyperkeratotic Actinic Keratosis

Recruitment & Eligibility

Inclusion Criteria

Signed and dated written informed consent.
Men and women aged between 18 and 85 years inclusive.
Have a general good and stable health condition as confirmed by a physical examination and by medical history.
Have at least 4 but not more than 10 clinically confirmed hyperkeratotic AK target lesions of moderate to severe intensity within the face/forehead or bald scalp
Skin type I to IV according to Fitzpatrick's .
Are free of any significant physical abnormalities (e.g., tattoos, dermatoses) in the potential treatment area that may cause difficulty with examination or final evaluation.
Physical ability to apply the study preparation correctly and to follow the study restrictions and visit.
Women of childbearing potential are allowed to participate in this study, only if they use a highly effective method of contraception

Main

Exclusion Criteria

Have received treatment of AK within the treatment area (face / scalp) in the three months preceding this clinical trial.
Have known hypersensitivity to the ingredients
Are subjects under immunosuppressive therapy.
Having coagulation defects which are inherited or acquired
Have evidence of clinically significant, unstable medical conditions
Have currently other malignant or benign tumors of the skin within the treatment area
Subjects who have taken topical or systemic treatments that might interfere with the study end points, within a time window that is not allowed, or who are currently taking phenytoin, methotrexate or sulfonylurea.
Subjects taking inhibitors of DPD (e.g. Brivudin, Sorivudin)
Are known to be pregnant or lactating (currently or within the past 3 months).
Have any dermatological disease in the treatment area or surrounding area that may be exacerbated by treatment
Are currently or within the past 8 weeks participating in another clinical study.
Have active chemical dependency or alcoholism as assessed by the investigator.
Subject is institutionalized because of legal or regulatory order.

Study & Design

Arm && Interventions

Group	Intervention	Description
1	LAS41005	Drug Las41005
2	Cryotherapy	Cryotherapy

Primary Outcome Measures

Name	Time	Method
Histological status (AK diagnosis and grade) of one predefined target lesion	Screening and 8 weeks after last treatment	Histological clearance at 8 weeks after end of treatment with LAS 41005, respectively 14 weeks after first cryotherapy. Histological Status will be measured by Histological Biopsy in order to confirm the diagnosis of AK and the grade.

Secondary Outcome Measures

Name	Time	Method
Total Actinic keratoses (AK)lesion count at each visit	day 1, day 21, day 42 and day 98.	The clearance rate (complete/partial) of AK lesions (determined by clinical evaluation) in the treatment area (target areas A and B) will be measured by comparing the total AK lesion counts pre-treatment (on Day 1 before study treatment has been applied) with the lesion counts measured.

Recruitment & Eligibility