Primary Pelvic Hydatid Cyst Obstructing the Labour

c Abstract: Hydatid disease, caused by Echinococcus granulosus, is a common parasitic infection of the liver. Primary pelvic hydatid cyst is an extremely rare condition and occurs in approximately 0.7% of patients. Hydatid disease in pregnancy is a very rare condition with incidence of 1/20000 pregnancies. We report here an unusual case of hydatid cyst of the pelvis in a 30 years old multigravida presenting with obstructed labour. Ultrasonography showed well defined mixechoic cystic mass in left adnexa. Patient underwent caesarian section with delivery of a healthy baby followed by obstetric hysterectomy and laparotomy for pelvic hydatid cyst. Histopathology confirmed hydatid cyst. Patient was put on chemotherapy and is doing well on follow up. A pelvic hydatid cyst should be taken into consideration in cases of cystic masses, especially in endemic regions. The case represents an uncommon site and uncommon presentation of a common disease.