<prompt> True about endometriosis:Presence of endometrial gland in deep myometriumPresence of endometrium at ectopic locationsTreated preferably with hysterectomySeen in multiparous women  <response>: Endometriosis Presence of endometrial tissue at ectopic location Etiology : Retrograde menstruation Proposed by Sampsons Sampsons Implantation theory 70-80 of all women have retrograde menses Among them 5-10 have poor immunity and estrogenecity and develops Endometriosis NOTE: Option A, C, D, are related to Adenomyosis 