Abstract

Introduction: Hydatid disease is a parasitic infestation caused by tapeworms of the genus Echinococcus. It may be located anywhere in the human body. The most common organs involved are the liver (52-72%) and the lungs (10-40%). Hydatid disease can rarely develop in muscular structures, accounting for 1-5% of all cases.
Case Presentation: In this study, we report the case of a 53-year-old male patient who presented with a swelling on his left lumbar region and was diagnosed with hydatid disease within the quadratus lumborum muscle.
Conclusion: If any patient living in endemic countries as Turkey presents with a swelling in soft tissues and if he or she should be undergone investigations such as biopsy or cyst aspiration, then it will be mandatory to make a cautious physical examination and accurate imaging studies by keeping in mind the hydatid disease as a probable diagnosis.

Key words: Echinococcosis, hydatid cyst, liver, muscle