Endometriosis symptoms often start at a young age, and the time between symptom onset and endometriosis diagnosis can be several years. It is not clear whether the symptoms that are experienced by adolescents differ from adults. Better understanding may shorten the often lengthy delay in diagnosis.

The purpose of the study was to further elucidate the symptom presentation of adolescents as compared with adults to determine whether differences existed, based on age at surgical diagnosis that could impact time to diagnosis.

This investigation was a cross-sectional study at enrollment within a longitudinal cohort of adolescents and women with endometriosis. The population-based cohort was recruited from 2 tertiary care centers and the surrounding communities. Participants included adolescents (diagnosed at ≤18 years old; n=295) and adults (diagnosed at >18 years old; n=107) with surgically confirmed endometriosis who were enrolled into The Women’s Health Study: From Adolescence to Adulthood. Participants completed an expanded version of the World Endometriosis Research Foundation Endometriosis Phenome and Biobanking Harmonization Project standard clinical questionnaire that included items regarding menstrual history, associated symptoms, and pain. Chi-square or Fisher’s exact tests were applied to categoric data; Wilcoxon rank sum tests were applied to continuous data.

Most participants (90%) experienced moderate-severe menstrual pain. On average, 3 doctors were seen before diagnosis, regardless of age at presentation (range, 0-25 years). Time from symptoms to diagnosis averaged 2 years for adolescents and 5 years for adults (P<.001). More adolescents (50%) than adults (33%) reported pain starting at menarche (P=.002) and nausea accompanying pain (69% vs 53%; P=.01). Noncyclic, general pelvic pain was prevalent. One-half of the participants reported relief of their general pelvic pain after a bowel movement. Pain interfered with work/school, daily activities, exercise, and sleep to a moderate-extreme degree; difficulties were similar by age at diagnosis.

Pelvic pain was severe and noncyclic and negatively impacted quality of life. At our tertiary care centers, symptoms of endometriosis did not differ between women surgically diagnosed during adolescence compared with those diagnosed as adults. Adolescents had more nausea and symptom onset at menarche. Multi-year delays in diagnosis were common. Clinicians should be aware of these alternate symptom patterns and include endometriosis in their differential diagnosis for both adolescent and young adult women who experience noncyclic pelvic pain and nausea.