P10.11: Prevalence of endometriosis in MRI among adolescent presenting dysmenorrhea: preliminary results

To determine the prevalence and the phenotype of endometriosis in MRI, among adolescent who present severe dysmenorrhea. Prospectively, adolescent presenting severe dysmenorrhea were offered to perform MRI, in order to diagnose endometriosis. Clinical data was collected via interviewed questionnaire and a trained radiologist assessed MRI lesions, which were classified in different phenotypes: superficial endometriosis (SE), deep iinfiltrating endometriosis (DIE), endometriomas (OMA) and adenomyosis (Ad). Moreover the presence of contractions was systematically assessed by CINEMRI. A total number of 99 MRI were performed with allocated adolescents' interviews. Their mean age was 17,6 ± 2,084 SD years. The age of menarche in years was 12,3 ± 1.37 SD. Overall endometriosis was found in 48.4% (n = 48), SE in 24,2% (n = 24), DIE in 25,2% (n = 25), OMA in 12,1% (n = 12) and Ad in 17,1% (n = 17). Uterine contractions (UC) were visualised during MRI procedure in 33,3% (n = 33). Concerning the variable of age, there was no significant prevalence of particular type of endometriosis but pain score rate was significantly higher for adolescent aged of more 16 years old compared to the youngest (87,7% vs 66,7% p = 0,019). Presence of UC was not correlated with the presence of adenomyosis (78,8% of UC without adenomyosis) neither other sort of endometriosis. The prevalence of DIE was significantly higher in case of secondary dysmenorrhea than in primary dysmenorrhea (40,7% vs 20,3% p = 0,04). The study concluded the high prevalence of endometriosis in MRI for adolescents with severe dysmenorrhea, without particular predominant phenotype, even DIE appears to be more frequent for secondary dysmenorrhea. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.