Uterine cyst - a rare cause of pelvic mass

• Main Author: Tlemçani,Inês
• Publication Date: 2025
• Other Authors: Castro,Catarina, Ribeirinho,Ana Luísa, Reis-De-Carvalho,Catarina
• Format: Report
• Language: eng
• Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
• Download full: http://scielo.pt/scielo.php?script=sci_arttext&pid=S1646-58302025000100074
• topic: Endometriosis; Adenomyosis; Uterine Cyst; Laparoscopy; Endometrioma.

Abstract The diagnosis and determination of the origin of a pelvic mass is often challenging. For masses of uterine origin, the differential diagnosis typically focuses on leiomyomas and uterine sarcomas, due to the higher incidence of the former and the severity associated with the latter. However, other uterine masses, such as those with cystic content, should also be considered. We present the case of a 49-year-old woman with a history of chronic pelvic pain and an ultrasonographic diagnosis of a cystic adnexal mass. During the surgical procedure, the cystic mass was found to originate from the uterine serosa. Histological analysis confirmed it to be an endometrial cyst, also known as a uterine endometrioma. This case highlights the importance of including endometrial cysts - a rare entity - in the differential diagnosis of cystic pelvic masses of uterine origin. Recognition of this condition is crucial for appropriate clinical management.