Primary objective:Identify the criteria correlated to the presence of sarcopenia (defined by the measurement of the IMS by the CT-X method in L3) among the impedancemetry and the HAS malnutrition criteria~Main judgment criteria : Comparison between the groups of patients with sarcopenia (Morphometric measurement of the musculoskeletal surface index <39cm²/m² in L3 cross section) and without sarcopenia of the different evaluation criteria:~Impedancemetry values:: muscle mass index in kg/m2 (IMS), fat-free mass in kg/m2 and metabolic activity index (phase angle)~Percentage of weight loss~BMI < 18.5 kg/m2~Quantified reduction in muscle mass and/or function for patients < 70 years old~Quantified reduction in muscle mass and function for patients > 70 years old~Physical tests: walking speed and hand grip dynamometer secondary objectives:- Proposal of a composite score for the detection of sarcopenia usable in clinical routine~Evaluation of nutritional intake~Evaluation of the severity of undernutrition~Verification of a correlation between the sarcopenia indices of ovarian and endometrial cancer~Evaluate tolerance profiles to systemic treatments with regard to sarcopenia figures~Assess the relationship between PFS, OS and sarcopenia index in cancer diagnosis secondary judgment criteria :~Statistical analysis of sarcopenia and undernutrition data~Quantification of ingestates (SEFI scale) +/- intake of oral nutritional supplement~Serological tests: NFS, CRP and Albuminemia~Comparison of sarcopenia index figures between ovarian and endometrial cancer~Collection of the grades of toxicities and adverse events to systemic treatments in parallel with the measurement of sarcopenia.~Correlation between progression-free survival, death and sarcopenia index at cancer diagnosis
Prospective monocentric study, non-randomized of the detection of sarcopenia in clinical practice in patients with ovarian or endometrial cancer requiring systemic oncological treatment.~main question : Identify the criteria correlated with the presence of sarcopenia (defined by the measurement of the IMS by the CT-X method in L3) among the impedancemetry and the HAS malnutrition criteria.~Data collection will be done at 6 months, 12 months after the date of inclusion.