“…From the historical perspective of the senior author, who accompanied Vincent Capraro on pediatric and adolescent gynecology consultations at Buffalo Children's Hospital in 1962-1963, and accompanied Somers Sturgis at his weekly consultations at the Adolescent Unit of the Boston Children's Hospital Medical Center in 1963-1964, the focus on adolescent endometriosis has moved from nonrecognition, 1 random case reports, 2,3 and case series associated with and without outflow obstruction, [4][5][6] to recognition of endometriosis five months after menarche in an adolescent without outflow obstruction, 7 to the diagnosis of endometriosis before menarche, 8 to recognition of the Tanner classification of breast development as a guide to age-specific medical therapy, 9,10 to the first efforts toward disease-specific and prognosis-specific diagnoses. 11,12 In sum, adolescents with endometriosis have benefited from four decades of research.…”