Actinic Keratosis (AK)

The goal of this observational study is to learn about the effectiveness of tirbanibulin among adult subjects with actinic keratosis (AK) lesions in the face. The main question it aim to answer is: How does tirbanibulin improve subject's overall appearance of the skin, improve how patient's skin looks, and improve patient's skin texture, in a 57-day observation period. Participants already taking tirbanibulin as part of their regular medical care for AK will answer online survey questions at the beginning of the study and at Day 57.

A Randomized Controlled Trial of Topical 5% Niacinamide for Skin Cancer Prevention in Organ Transplant Recipients This study is designed to evaluate whether a topical 5% niacinamide cream can help prevent skin cancer in organ transplant recipients. Individuals who have received an organ transplant have a much higher risk of developing precancerous skin growths and skin cancers because of long-term immune-suppressing medications. Although sunscreen is an important part of sun protection, additional preventive approaches are needed. Early research suggests that niacinamide may help protect the skin, and this trial will examine whether a topical formulation provides benefit in this high-risk group. The study will test whether daily use of topical 5% niacinamide reduces the number of actinic keratoses over 6 and 12 months and whether it decreases the development of new keratinocyte cancers when compared with sunscreen alone. The study will also evaluate how well the topical product is tolerated and whether it can be used consistently as part of a daily skin-care routine. A total of 20 adult organ transplant recipients with a history of multiple actinic keratoses and at least one prior non-melanoma skin cancer will enroll in this 12-month, randomized, controlled trial. Participants will be assigned to receive either daily topical 5% niacinamide plus sunscreen or sunscreen alone. Skin examinations will be performed at 6 and 12 months using standardized mapping methods. Information on treatment tolerability, adherence, and any side effects will be collected through structured surveys, and any lesions suspicious for cancer will be evaluated by a board-certified pathologist.

This clinical trial will assess the safety and tolerability of topical application of RLS-1496 cream to lesions and adjacent skin on the left forearm of adults with actinic keratoses (AK) on the arms. The right forearm will remain untreated as a control. The therapeutic objective of topical treatment with RLS-1496 cream is to clear or decrease the number of AK in the treated area, per lesion counts performed by the Investigator. The main questions it aims to answer are: * Is it safe to apply topical RLS-1496 cream to treat AK once daily for 28 days? * Does topical RLS-1496 lower the number of AKs or eliminate AKs in a treated area when applied once daily for 28 days? Researchers will compare results on the left (treated with RLS-1496) and right (no treatment) forearm. Participants will apply RLS-1496 to an identified area on the left forearm once each day for 28 days and have intermittent clinic visits to examine the arms and have the AK lesions counted until 28 days after the last application of RLS-1496. Participants will also have small skin biopsies on the arms.

Participants will be invited to take part in a research study as they have been diagnosed with multiple actinic keratosis lesions (AK). AK usually present as small, rough, dry, scaly and/or crusty patches or papules of the skin that can be skin-coloured pink, red, tan or a combinationof colours and are often easier to feel than see at their earlier stages. AK are commonly diagnosed in adults, particularly in patients aged 45 years and older and are considered to be pre-cancerous lesions. The research is aiming to investigate the protective effect of an investigational sunscreen known as Anthelios Fluide 100 KA+ UVMune 400, when used together with good sun protection habits (which include staying in the shade during the hours of 11 am and 3 pm, wearing sun-protective clothing, wearing a wide-brimmed hat) in participants with multiple Actinic keratoses's. Eligible participants will be randomly assigned into 1 of 2 groups - an intervention or control group The study main objective is to evaluate tested sunscreen prevention on actinic keratosis lesions.

This is a phase Ib study to evaluate the safety, tolerability, pharmacokinetic (PK), and pharmacodynamic (PD) characteristics of HW211026 ointment after single or multiple topical administrations in patients with actinic keratosis.

The aim of this study is to observe the influence of tirbanibulin on proliferation patterns of actinic keratoses (efficacy on proliferation score according to Schmitz et al.). For this purpose, tirbanibulin is applied in-label, proliferation is measured by LC-OCT at different time points and dermatohistopathology is performed (optionally) at the end. Local skin reactions to the product will also be recorded (tolerability).