Primary retroperitoneal hydatid cyst

Case contributed by Dr Ammar Haouimi


Right lower quadrant pain. Ultrasound exam revealed a complex cystic mass of the right iliac fossa.

Patient Data

Age: 60 years
Gender: Male

There is a large well-circumscribed retroperitoneal cystic mass arising from the right iliacus muscle measuring (20x14x12 cm), composed of multiple peripheral daughter vesicles with a central solid matrix. It shows upward extension, displacing the right kidney as well as the cecum and ascending colon anteriorly. Note mild cortical erosion of the adjacent iliac bone.

Small cysts are noted in the segments II and IV of the liver (simple hepatic cysts confirmed by ultrasound).

No pulmonary hydatid cyst is seen. 

Case Discussion

CT appearances of a primary retroperitoneal hydatid cyst arising from the iliacus muscle

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Case information

rID: 64336
Published: 18th Nov 2018
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included
Institution: Aurès Medical Imaging Center - Batna Algeria

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