Inclusion Criteria:  Patient followed for SSc in the internal medicine or cardiology department of the Lille University Hospital Fulfilling the ACR/EULAR and/or VEDOSS criteria for SSc Being insured by the French social security system Having the ability to understand the requirements of the study and provide informed consent  Exclusion Criteria:  Administrative reasons: unable to receive informed information, lack of social security coverage Pregnant or lactating women Persons deprived of liberty Minors or protected adults Persons who have refused or are unable to give informed consent Persons in emergency situations