Hydatid Cyst of Paravertebral Muscle Mimicking Disc Herniation

Abstract

N/A.

Hydatid Cyst in the Lumbar Paravertebral Muscle: A Case Report

“…A hydatid cyst is a zoonotic disease caused by the helminth Echinococcus granulosus. It has a worldwide distribution and is endemic in specific regions; among them are Mediterranean countries and the Middle East [2-3]. It continues its life cycle in dogs and sheep and infects humans with excessive exposure to these animals or through the ingestion of food and water contaminated by their feces [4].…”

“…Therefore, in endemic countries, a hydatid cyst should be considered as a differential diagnosis of mass lesions that have a cystic nature. However, even in endemic countries, it rarely affects musculoskeletal and soft tissues and, almost always, this site of infection is accompanied by a liver or lung infection [2,7], as these organs act as the port of entry of parasites after penetrating the duodenal wall [5-6].…”

“…The sole and primary involvement of a lumbar paravertebral muscle without concomitant liver or lung involvement has been just reported in a few case reports [2,5,8-10]. Therefore, diagnosis may be challenging in such cases given that serologic tests may be negative in isolated muscular hydatid cysts [11].…”

“…The parasites less frequently enter the systemic circulation and disseminate throughout the body to infect other organs, including the brain, vertebral column, and spinal cord [5-6]. Musculoskeletal involvement is rare and contributes to 0.5%-5% of cases of hydatid cysts and is almost always secondary to liver or lung infection [2]. Primary musculoskeletal and, in particular, muscular involvement without visceral infection is extremely rare [7]; therefore, it may be a difficult and challenging differential diagnosis.…”

“…Primary musculoskeletal and, in particular, muscular involvement without visceral infection is extremely rare [7]; therefore, it may be a difficult and challenging differential diagnosis. Among musculoskeletal sites, there are only a few cases reporting the primary involvement of paravertebral muscles [2,5,8-10].…”