Abstract
Background. Actinic keratosis (AK) is a common premalignant skin condition. Its diagnosis is based on a clinical and sometimes dermoscopic examination, but, in some situations, a skin biopsy may be necessary. Dynamic optical coherence tomography (D-OCT) can often bypass this need, by noninvasive evaluation of skin morphology. Early and effective treatment of AKs is important to prevent the progression to invasive squamous cell carcinoma (iSCC). Tirbanibulin 1% ointment, a new topical field therapy for AKs, has recently been introduced. Objectives. The aim of this study was to evaluate the efficacy and safety of tirbanibulin 1% ointment for the field treatment of nonhyperkeratotic, nonhypertrophic AKs (Olsen grade 1) on the face and/or scalp in adults, using D-OCT technology. Methods. Patients, presenting multiple, mild to moderate AKs on the face and scalp, in treatment with tirbanibulin 1% ointment for five consecutive days of an area measuring 25 cm2, were evaluated with videodermoscopy (V-track Vidix 4.0) and D-OCT (VivoSight Dx, Michelson Diagnostics Ltd., Kent, England, United Kingdom), as normal clinical practice. The lesions were staged according to the Olsen classification, excluding the most aggressive lesions. Results. We retrospectively evaluated 50 patients (27 males and 23 females, mean age 76 ± 7.9 years). At 57 days posttreatment, the complete clearance rate was 68% (n = 34) and partial clearance rate was 76% (n = 38). D-OCT showed markedly improved morphology, including a better recognizable dermal-epidermal junction (DEJ), associated with reduced inflammation. The most common adverse events reported were erythema and scaling, which were mostly mild and self-limiting. Conclusions. This study demonstrated that tirbanibulin may be considered an effective and well-tolerated treatment option for nonhyperkeratotic, nonhypertrophic AKs. It showed a favorable safety profile, with mostly mild adverse events. D-OCT can be considered a useful tool for personalizing AK treatment and monitoring.
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