Improvement of Pigmented Skin Lesions in Patients With Mastocytosis After Performing 2 Sessions of Pigment Laser

Inclusion Criteria: * Patient with mastocytosis (diagnosis confirmed clinically according to international criteria) * Patient with pigmented skin lesions, of moderate to very severe severity (by comparison with a 4-point photographic scale: light, moderate, severe and very severe) * Major patient aged ≥ 18 years. * Patient with social security coverage * Patient having given written, free and informed consent to participate in the study Exclusion Criteria: * Patients with mastocytosis, without skin lesions * Patient with pigmented skin lesions, only of mild severity (by comparison with a 4-point photographic scale: mild, moderate, severe and very severe) * Patient with another cutaneous mastocytosis phenotype * Patient treated by a treatment known as a cytoreductive for mastocytosis: alpha interferon, cladribine, imatinib, midostaurin or any cytoreductive treatment being evaluated by clinical trial in mastocytosis * Patient under guardianship, or under curatorship, or not fluent in the French language or unable to understand and complete the study questionnaires * pregnant or breastfeeding women * Patients with tanned skin following photoexposure within 3 weeks of starting the study