Tolerance and Performance of Cyto-selective Difluoroethane-based Cryotherapy in the Treatment of Brown Spots (Solar and Senile Lentigines, Post-Inflammatory Hyperpigmentation)

Application on brown spots located on the face and/or the hand (12 treatments during the study). An operator previously trained by the dermatologist will apply the study device to the patient's face or/and hand. Subjects will be lying down, and the prototypes will be administered upside down for the applications on the face and sitting for the applications on the hands. For the application on the hands, the hands will be placed flat on the table and the prototypes will be applied upside down. During applications on the face, subjects will wear diving goggles protecting the eyes from cryogenic gas.

Application on brown spots located on the face and/or the hand (6 treatments during the study). An operator previously trained by the dermatologist will apply the study device to the patient's face or/and hand. Subjects will be lying down, and the prototypes will be administered upside down for the applications on the face and sitting for the applications on the hands. For the application on the hands, the hands will be placed flat on the table and the prototypes will be applied upside down. During applications on the face, subjects will wear diving goggles protecting the eyes from cryogenic gas.