Inclusion Criteria:  Patient over 18 years-old suffering from Ehlers-Danlos Syndrome and belonging to the EDS cohort of Raymond Poincaré Hospital in Garches Patient with joint involvement of the shoulder treated by surgery Patient with ankle joint damage treated by surgery Patient with joint damage to the knee treated by surgery Patient with elbow joint damage treated by surgery Patient with joint involvement of the wrist treated by surgery Patient affiliated or beneficiary of a social security scheme Patient who has been informed of the research and does not object to the use of his data.  Exclusion Criteria:  Patient objecting to the use of their data