title: Spontaneous Membranous Dysmenorrhea in an Adolescent Girl: A Case Report and Literature Review.
abstract: BACKGROUND
  Membranous dysmenorrhea is a rare entity. It involves the sloughing of the endometrium in 1 cylindrical or membranous piece, retaining the shape of the uterine cavity. Herein, we report the first case of spontaneous membranous dysmenorrhea in an adolescent girl.
  
  
  METHODS
  A 17-year-old girl was admitted to the emergency clinic with severe painful menstrual bleeding and passage of tissue via the vagina. Bloody endometrial tissue resembling the endometrial cavity expulsed from the vagina was seen on inspection. The pathologic diagnosis of the mass was membranous dysmenorrhea.
  
  
  CONCLUSIONS
  To our knowledge, this is the first case of the spontaneous occurrence of membranous dysmenorrhea. The relationship between membranous dysmenorrhea and endogenous or exogenous progesterone should be investigated further. A review of the literature on membranous dysmenorrhea is presented.
authors.affiliation: Department of Obstetrics and Gynecology, Dr Zekai Tahir Burak Women's Health Education and Research Hospital, Ankara, Turkey. Electronic address: dronurtopcu@gmail.com.
authors.forename: Hasan Onur
authors.initials: HO
authors.lastname: Topçu
authors.affiliation: Ankara Diskapi Children's Hospital, Department of Pediatrics, Ankara, Turkey.
authors.forename: Seda
authors.initials: S
authors.lastname: Topçu
authors.affiliation: Department of Obstetrics and Gynecology, Dr Zekai Tahir Burak Women's Health Education and Research Hospital, Ankara, Turkey.
authors.forename: Demet
authors.initials: D
authors.lastname: Kokanalı
authors.affiliation: Department of Obstetrics and Gynecology, Dr Zekai Tahir Burak Women's Health Education and Research Hospital, Ankara, Turkey.
authors.forename: Tuba
authors.initials: T
authors.lastname: Memur
authors.affiliation: Department of Obstetrics and Gynecology, Dr Zekai Tahir Burak Women's Health Education and Research Hospital, Ankara, Turkey.
authors.forename: Melike
authors.initials: M
authors.lastname: Doğanay
mesh_terms: D000293:Adolescent; D004412:Dysmenorrhea / Q000175:diagnosis / Q000209:etiology*; D004717:Endometrium / Q000473:pathology*; D005260:Female; D006801:Humans; D008598:Menstruation
keywords: Adolescent; Decidual cast; Membranous dysmenorrhea; Uterine cast