Wilson's Disease Treated With D-Penicillamine: Characterization of Skin Damage Secondary to Treatment by Measuring Skin Elasticity

Inclusion Criteria: Diseased patients : * Patient over 12 years old * Patient with Wilson's disease confirmed by genetic analysis * Patient followed up in the Wilson's Disease Reference Center for his care * Patient treated with D-Penicillamine * Patient with no other known elastic tissue pathology Healthy volunteers : * Patient over 12 years old * Patient followed up in the dermatology department of St Etienne University Hospital * Patient matched on sex and age with a patient from the "Wilson's disease" group * Patient with no elastic tissue pathology All patients : * Patient affiliated to a national social security * Patient with written informed consent Exclusion Criteria: All patients: * Patient not taking a treatment (at investigator's discretion) that may modify skin elasticity * Patient with pathological lesion(s) on forearm or cheek * Patient with a potentially active/rejuvenative forearm or cheek treatment * Patient having applied cream and/or make-up to the areas to be molded (forearm and cheek) * Patient under guardianship * Patient unable to follow study procedures * Pregnant or breast-feeding women