Cushing's Osteoporosis Specificities

This study are divided in two parts : \- Cross sectional cohort with both comparison between : Cushing syndrome versus control and cushing syndrome versus post-menopausal women Outcomes : Primary outcomes : Analysis thanks to pQCT will be carried out in order to compare radius and tibia bone mineral volume (total, trabecular and cortical) Secondary outcomes : Strength parameters, muscle area adipose tissue surface will be assessed. Analysis of body composition thanks to DXA (Dual Energy X ray Absorptiometry), and surface bone mineral density. Evaluation of Vertebral Fracture Assesment \- Prospective cohort with a longitudinal follow up on 5 years to assess the evolution of osteoporosis after treatment of Cushing syndrome (surgery or medical treatment). CS patients are recruited during hospitalisation in endocrinology service Post-menopausal women are recruited within rheumatology service. Cases are recruited thanks to advertisement within CHU.