CT and MRI Diagnosis of Cystic Brain Metastases / 实用放射学杂志

ABSTRACT

Objective To study the CT and MRI features of cystic brain metastases. Methods 26 cases of cystic brain metastases proved by clinicopathology were presented.There were13 males and 13 females with an average age of 52.7 years.CT studies were obtained in 15 cases,while MR studies were done in 13 cases.11 cases had CT and/or MRI contrast enhancement studies. Results According to the shape of the wall of cystic brain metastases,48 tumors in 26 cases were classified into three types irregular,nodular,regular type.The wall demonstrated iso-or slightly high density on CT and iso-or slightly low intensity on MR T_1WI and T_2WI,while the hydatid fluid showed slightly high intensity on MR T_1WI and high intensity on T_2WI and iso-or slightly high density on CT compared to CSF.The tumors showed circular reinforcement on enhanced CT or MRI,with nodular enhancement in some cases. Conclusion Cystic brain metastases have mutiple types and should be differentiated from brain abcess and other cystic brain parenchamal tumors.Multi-direction enhanced MRI is helpful to diagnosis.