Pelvic hydatid cyst: 3 cases presented with suspected adnexal mass

Document Type : Case Report


1 Department of Obstetrics and Gynecology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran.

2 Department of Infectious Disease, Imam Khomeini Hospital complex, Tehran University of Medical Sciences, Tehran, Iran

3 Laboratory of Medical Genetic, ART and Stem Cell Research Center (ACECR), Tabriz, Iran

4 School of medicine, Tehran University of Medical Sciences, Tehran, Iran



Hydatid cysts are caused by Echinococcus granulosus, the usual organs in which the parasite lodges are the liver and lung. One of the most peculiar locations for cyst formation is the ovary and most of the cases are secondary, it has been reported that some cases are formed iatrogenically. In our practice, we encountered 3 cases of ovarian hydatid cysts. The common symptom among these three was abdominal pain and the following imaging methods had shown cystic lesions.
Our first case was particularly interesting as the ultrasonographic characteristics were consistent with malignancies and later on, during the surgery it was revealed that the cyst was nothing but hydatid. Another interesting aspect was the fact that this cyst seemed to be primary as no other lesion was detected at the time.
Our second case before being referred was diagnosed with infertility and was under treatment. However, the large cyst was diagnosed with US imaging. The patient underwent laparoscopic cystectomy and the parasitic lesion was removed however as the patient manifested urticaria she had to be admitted to ICU. She made an uncomplicated recovery
Our third case was a pregnant woman and was previously diagnosed with a hydatid cyst. With suspicious cyst rupture, she underwent surgery and the origin of the cyst was revealed to be parasitic
Due to similar appearances, these cysts are in differential diagnosis with other lesions, and careful management in highly prevalent areas must be considered. Even with all advanced technologies hydatid cysts still challenge both surgeons and radiologists.


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