Musculoskeletal hydatid infection

Musculoskeletal hydatid infections are a very rare form of hydatid disease.

For a general discussion, and for links to other system specific manifestations, please refer to the article on hydatid disease

Patients usually present with slow growing swelling with or without pain.

They can present almost anywhere, but most common locations are:

  • vertebrae (see spinal hydatid disease) and para-vertebral soft tissue
  • pelvis
  • femur and soft tissue of lower limb
  • tibia
  • may show expansile lytic lesion in the involved bone which can be unilocular or multilocular with coarse trabeculae
  • thinning of cortex
  • adjacent soft tissue swelling may be seen due to direct extension from the bone or co-existing multiple soft tissue lesions

Ultrasound may depict lesions in the soft tissue which can be solitary/multiple unilocular/multilocular/complex cystic lesions and/or atypical solid hypoechoic lesion.

Better delineates expansile unilocular or multilocular lytic lesion and demonstrates any soft tissue extension. Co-existing soft tissue multilocular cysts may be seen.

  • T1: hypointense cyst
    • may show low-intensity rim
  • T1 C+: shows wall enhancement
  • T2: hyperintense cyst (uni/multilocular) with a low-intensity rim
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Article information

rID: 32440
Tag: refs, cases
Synonyms or Alternate Spellings:
  • Musculoskeletal manifestations of hydatid infection

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Cases and figures

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    Case 1: primary hydatid cysts of the soft tissues
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    Case 2: within vastus lateralis muscle
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