CT Diagnosis of Liver Inflammatory Myofibroblastic Tumor

Objective To analyze CT manifestations of liver inflammatory myofibroblastic tumor and to improve the diagnostic accuracy. Materials and Methods All of the 9 cases which were comfirmed by surgery or needle biopsy were undergone plain CT scanning and enhanced scanning. Results Totally 10 lesions were found in 9 patients. 9 lesions showed slightly low or low-density on CT plain scanning.8 cases showed mild enhanced or not enhanced in arterial phase.Lesions further enhanced in portal venous phase and 8 lesions showed mild to moderate enhanced.6 lesions showed delayed enhancement in delayed phase.8 lesions showed peripheral ring-enhanced or separation-like enhanced.3 lesions showed double-ring sign or three-ring sign and 2 lesions showed petal-like enhanced.10 lesions appeared as a clear boundary in portal venous phase and 5 lesions with space-occupying effect.4 cases showed surrounding edema in arterial phase or with cholangiectasis or cholelithiasis. Conclusion Liver inflammatory myofibroblastic tumor has a certain characteristic manifestations on CT scanning.It can be identified with the other diseases of the liver by careful analysis of the enhanced CT features.