Focal Atypical Endometrial Hyperplasia Arising Within a Deeply Infiltrating Bladder Endometriotic Nodule

This report presents a patient with deeply infiltrating bladder endometriosis who underwent laparoscopic excision with partial cystectomy, revealing focal atypical endometrial hyperplasia within the bladder nodule on histopathology. The case highlights the importance of surgical planning, thorough surgical excision and histologic assessment of complex endometriosis cases, as well as the need for individualized management and surveillance strategies when atypia is identified in extrauterine endometriotic disease.