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


Share article

Article information

rID: 32440
Tags: refs, cases
Synonyms or Alternate Spellings:
  • Musculoskeletal manifestations of Hydatid infection

Support Radiopaedia and see fewer ads

Updating… Please wait.

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.