Deciphering the Vitiligo Transcriptomic Signature Between Repigmented and Non Repigmented Lesions

Inclusion Criteria: * Subject: male or female aged ≥ 18 years and ≤ 65 years * Diagnosis of non-segmental (symmetrical) vitiligo with a body surface area involved \>5% excluding hands and feet, with lesions located on arms * Active non-segmental vitiligo is defined by: * Non-segmental vitiligo with new patches or extension of old lesions during the last 6 months AND * Presence of hypochromic aspect under Wood's lamp examination and/or perifollicular hypopigmentation under Wood's lamp examination. * Able to read, understand, and give documented informed consent * Registered in the French Social Security * Patients that could receive the combination of oral steroids and phototherapy according the recommendation * Signed informed consent form Exclusion Criteria: * Segmental or mixed vitiligo * Are unable or unwilling to make themselves available for the duration of the study and/or are unwilling to follow study restrictions/procedures. * Are currently enrolled in any other clinical trial involving an investigational product or any other type of medical research judged not to be scientifically or medically compatible with this study.