CT manifestations of liver abscess

Objective To study CT findings of hepatic abscess.Methods CT findings and clinical materials of 38 patients with liver abscess verified by aspiration were retrospectively viewed.All patients were examined by non-enhanced and contrast enhanced CT.Results In 25 cases,inhomogeneous hypodense lesions with unclear demarcation were found on non-enhanced CT.On contrast enhanced CT scan,target or cluster enhancement was found.Additionally,air was found within some lesions.In the rest 13 cases with early stage liver abscess,no typical sign was found on non-enhanced CT,while rosette sign and continued enhancement sign were demonstrated after the contrast agent was given.Conclusion Various CT findings are found in different stages of liver abscess.The diagnosis and differential diagnosis should be based on CT manifestations and clinical history as well.