Assessment of Nutritional Status in Systemic Sclerosis

The main theme of the cohort of systemic sclerosis (SSc) patients is the determination of nutritional status, its evolution and the evaluation of its management in patients with scleroderma. The main objectives are : * To determine the incidence of malnutrition and its main determinants (disease characteristics, severity, eating habits, physical activity) in patients with scleroderma. * For patients with undernutrition at inclusion or at 18 months follow-up: evaluate the impact of a standardized nutritional intervention (dietary advice, oral supplements, artificial, enteral or parenteral nutrition) on nutritional and disease parameters. Follow-up visits will take place every 6 months for 2 years. (M6, M12, M18 et M24). During each visit: a clinical examination, with anthropometric measurements, a 3-day dietary survey and a blood sample (10 ml), completion a multiple-choice of quality of life and physical activity evaluation. Paraclinical evaluation : echocardiography, lung function tests, screening for osteoporosis (M6 and M18). If undernutrition is detected during a follow-up visit, the subject will be referred to a specialized service.