Interest of Salivary Signature of Endometriosis in the Heathcare Pathway of Adolescent

Inclusion Criteria: * Patient aged between 10 and 19 years, * Patient over 18 or legal representatives of patient under 18 who has dated and signed the consent form, * Patient with pelvic MRI available and conduct within 12 months prior to inclusion, * Patient from one of the 3 study populations: * A formal endometriosis diagnosed by clinical examination and imaging or * With prescription for coelioscopy because of a discrepancy between clinical and radiological findings or * A surgical indication for a pathology of the small pelvis other than endometriosis, in adolescents with suspected endometriosis faced with symptoms suggestive (dysmenorrhea, chronic or cyclic pelvic pain, urinary disorders cycle-dependent) * Patient affiliated to the healthcare system. Exclusion Criteria: * Known pregnancy in progress, * Known infection with the human immunodeficiency virus (HIV), * Personal history of cancer, * Adolescent subject to a protective measure or placed adolescent, * Adolescent or her legal representatives presenting important difficulties in reading French language, * Patient or her legal representatives who have objected to the collection of her data, * Patient participating in an interventional study with drug or medical device or in the exclusion period of an interventional study * Patient who has participated or is participating in another study evaluating miRNA in endometriosis.