Congenital cystic adenomatoid malformation of fetus:manifestations and diagnosis of MRI / 中华放射学杂志

ABSTRACT

Objective To demonstrate the MRI manifestations of congenital cystic adenomatoid malformation(CCAM)and to evaluate the diagnostic value of MRI.Methods Thoracic axial,sagittal and coronal plane scanning were performed with SSFSE in 9 fetuses diagnosed or suspected of CCAM by ultrasound(US)within 1—2 days after US examination.The diagnosis was confirmed by postnatal autopsy or follow-up.Results In nine fetuses,seven cases of CCAM were diagnosed with MRI and confirmed by autopsy,one case was congenital pulmonary sequestration,one was normal on MRI and two weeks late US.In seven cases of CCAM(5 males and 2 females),four cases were in the right side,three in the left.Four cases of macrocystic type CCAM showed single or multiple cystic long T_2 signal in the unilateral lung,three cases of microcystic type CCAM presented long T_2 signal without cyst.Vessels with flow void phenomenon were found in 2 cases of CCAM and 1 case of pulmonary sequestration.Conclusion MRI can clearly show the location,range and contour of CCAM.The vessel originated from the aorta is suggestive of pulmonary sequestration.