A giant 25 litre volume ovarian cystic mucinous borderline ovarian tumour with intraepithelial carcinoma in a 24-year-old nulliparous woman: Case report.

Introduction And Importance: Giant ovarian cysts are rare and usually pose significant diagnostic challenges especially in adolescents and young adults. There is limited report of such cases reported in existing literature with hardly any cases published from the Sub-Sharan African region.

Case Presentation: We present the case of a 24-year-old young woman who reported to our gynaecology clinic on the 23rd of January 2023 with a year's history of a progressively increasing abdominopelvic mass.