Abstracts EFSS 2022

Endometriosis develops in many sites of the body.While the incidence of extragenital endometriosis is low, they are important in clinical practice since they are often much more difficult to treat than endometriosis in common sites, i.e. the ovary, cul-de-sac, and pelvic peritoneum.In addition, pathogenesis and pathophysiology of extragenital endometriosis is poorly understood.In the lecture, I present our cases and literature review.Inguinal endometriosis and umbilical endometriosis are relatively easy to diagnose and are good indication for surgical treatment.I show several tips useful in treating these diseases.Among extragenital endometriosis, thoracic endometriosis syndrome (TES) appears to be the most intractable disease.TES comprises catamenial pneumothorax (CP), endometriosis-related pneumothorax (ERP), and catamenial hemoptysis (CH).In our study, we found the age distribution of male pneumothorax patients had two peaks (around 18 and 80 years) while female pneumothorax patients had an additional peak around 40 years.Analyzed in detail, it was suggested that the peak reflects CP and ERP.In another study, we revealed that the age at onset was significantly lower in patients with CH than in patients with CP/ERP.Most of patients with CP/ERP, pneumothorax was observed on either the right side or bilaterally, however there was no tendency toward laterality of CH.The findings indicate that pathogenesis is different between CP/ERP and CH.