title: [Ultrasound signs of pseudoneoplastic forms of hepatic hydatid cysts. A prospective analysis of 50 cases].
abstract: Pseudoneoplastic hydatid cyst of the liver (type IV), still raises diagnostic difficulties on ultrasonography (US), and often leads us to perform computed tomography. We therefore, conducted a prospective study of 50 cases of hepatic hydatid cyst (HHC) type IV in order to define the US and Doppler features allowing easy diagnosis with the best cost-effectiveness ratio. HHC type IV represented 23.7% of all types. The average age was 43.5 years with a female predominance. Many signs were described and their frequency was established. The main signs were daughter cysts (82%), hypo or hyperechoic spirals (66%), and peripheral transonic collarette (54%). At least one of these signs was present in 90% of cases. The Doppler study showed the avascular nature of the lesion in 100% of cases. Hydatid serology using modern immunologic techniques confirmed the diagnosis in 74% of cases. The US-serology combination can establish the positive diagnosis of HHC type IV in 94% of cases. Computed tomography therefore has a small place in this setting.
authors.affiliation: Service Central de Radiologie, CHU Ibn Rochd, Casablanca, Maroc.
authors.forename: M
authors.initials: M
authors.lastname: el Hajjam
authors.forename: O
authors.initials: O
authors.lastname: Essadki
authors.forename: N
authors.initials: N
authors.lastname: Chikhaoui
authors.forename: R
authors.initials: R
authors.lastname: Kadiri
mesh_terms: D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D004444:Echinococcosis, Hepatic / Q000000981:diagnostic imaging* / Q000276:immunology; D005260:Female; D006801:Humans; D008113:Liver Neoplasms / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
vernacular_title: Sémiologie échographique des formes pseudotumorales du kyste hydatique du foie. Etude prospective de 50 cas.