Open AccessProtection against summer solar lentigo over‐pigmentation with a SPF 30 daily cream
Author(s) -
Josse G.,
Le Digabel J.,
Questel E.
Publication year - 2018
Publication title -
skin research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.521
H-Index - 69
eISSN - 1600-0846
pISSN - 0909-752X
DOI - 10.1111/srt.12458
Subject(s) - medicine , dermatology , skin color , computer science , artificial intelligence
Background/purpose The aim of this study was to measure lentigines' pigmentation over a long period of time and evaluate if summer over‐pigmentation can be avoided by the use a SPF 30 day skin cream. Methods Seventeen healthy female volunteers aged 50 and over and presenting lentigines participated in the study from spring to summer. Throughout the study, all subjects applied a SPF 30 daily skin cream to only one hand. Color measurements of the target lesions were performed with a chromameter and with a color‐calibrated camera. Target lesions were also imaged with in vivo reflectance confocal microscopy ( RCM ). A specific procedure for re‐registering the images was developed to ensure that the same papillae were measured over time. Results Both color measurement methods, chromametry and color‐calibrated camera, showed that lentigines treated over time with the SPF 30 day skin cream were significantly lighter than the non‐treated lentigines. The RCM images showed a decrease in the papillary contrast for the treated lentigines. Conclusion This study shows that this over‐pigmentation can be avoided using a SPF 30 day skin cream. Moreover, we have demonstrated that very fine re‐registration of the RCM images is possible and ensures a more robust analysis.