[X-ray computed tomography of hydatid cyst of the liver: symptomatology and classification. Apropos of 157 cases including 146 surgically confirmed].

Computed tomography (CT) and in most cases ultrasonography imaging was carried out in 157 patients with suspected hydatid cyst of liver (HCL), and the diagnosis was confirmed on operation in 146 cases. Findings enabled enrichment of CT semiology, proposals for a classification of HCL and precision concerning the value of CT for diagnosis of this affection. The CT scan was observed to provide data on the lesions and to establish the diagnosis of HCL in almost all patients (only one false positive in the 146 cases operated upon). It appeared to be a more reliable method than other exploratory examinations, particularly ultrasonography, in a good number of cases. The indications for CT are defined and the place of this examination in overall investigatory procedures discussed.