Kidney Function and Anorexia Nervosa

Anorexia nervosa (AN) is an eating disorder that can lead to severe medical complications. Kidney injuries are unknown in patients with extremely malnourished AN (BMI \<13). The primary objective of the study is to evaluate the frequency and to determine the profiles of patients who may develop kidney injuries. The secondary objective is to evaluate the evolution of kidney injuries after a phase of refeeding. Guidelines for medical treatments and dietary intakes will be recommended to avoid severe or irreversible renal disease.