title: CT findings in skeletal cystic echinococcosis.
abstract: OBJECTIVE
  To evaluate the CT findings of skeletal cystic echinococcosis.
  
  
  METHODS
  CT findings of 7 patients with pathologically confirmed skeletal cystic echinococcosis were evaluated.
  
  
  RESULTS
  There were 4 men and 3 women, aged 36-75 years. Hydatid cysts were located in the spine (n=2), a rib (n=3), the pelvis and a vertebra (n=1), the pelvis and the left femur (n=1). The size of the lesions varied from 1 cm to 15 cm. CT showed well defined, single or multiple cystic lesions with no contrast enhancement, no calcification, no daughter cysts, and no germinal membrane detachment. The cystic lesion had a honeycomb appearance in 2 cases; there was pathologic fracture in 2 cases, bone expansion in 5 cases, cortical thinning in 6 cases, cortical destruction in 6 cases, bone sclerosis in 1 case, and soft tissue extension in 6 cases.
  
  
  CONCLUSIONS
  Preoperative differential diagnosis of skeletal cystic lesions should include cystic echinococcosis, especially in endemic areas, since this diagnosis may easily be missed unless kept in mind.
authors.affiliation: Department of Radiology, Social Security Hospital, Ankara, Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Tüzün
authors.forename: B
authors.initials: B
authors.lastname: Hekimoğlu
mesh_terms: D000328:Adult; D000368:Aged; D001845:Bone Cysts / Q000000981:diagnostic imaging* / Q000469:parasitology*; D004443:Echinococcosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed