Musculoskeletal hydatid infection

Musculoskeletal hydatid infections are a very rare form of Echinococcosis/hydatidosis.

For a general discussion see 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

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

  • 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

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
Tags: refs, cases
Synonyms or Alternate Spellings:
  • Musculoskeletal manifestations of Hydatid infection

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