Introduction/Background Pelvic hydatidosis is a rare localization of echinococcosis. It represents less than 1% of all localizations. It concerns the genital area in 80%. Diagnosis of pelvic hydatid cyst is based on good history taking and is often difficult due to differential diagnosis with other cystic formations particularly ovarian cancer.The objective of our study is to highlight the epidemiological profile, the diagnostic and therapeutic means of pelvic hydatidosis.

Methodology Retrospective study spanning 7 years from January 1, 2015 to December 31, 2021 on 5 patients treated for primary pelvic hydatid cyst in the obstetrics gynecology department A at Charles Nicolle’s hospital.

Results 5 patients were studied in this work with age extremes between 23 and 71 years. All the patients were from a rural area. Two of our patients reported hepatic hydatidosis . In 80% of cases, the cyst was revealed by an abdominal mass, associated with pelvic pain in 3 cases and abnormal postmenopausal uterine bleeding in one case. The cyst was discovered, in one case, incidentally during a first trimester obstetric ultrasound. All patients underwent an abdominopelvic ultrasound showing multi-partitioned cystic formations (type 3 according to GHARBI classification) whose size varied between 8 and 18 cm.Hydatid serology was performed in all cases and came back positive in two cases.Complementary abdominopelvic CT was performed in 3 of our patients. All patients underwent midline laparotomy straddling the umbilicus. The pregnant patient underwent a cystectomy at the same time as the caesarean section. 4 cases required medical treatment. Histopathologic examination confirmed the diagnosis in all cases.

Conclusion The diagnosis of pelvic hydatid cyst should always be kept in mind with any abdominopelvic mass developing in a patient from an endemic region.