Congenital Cystic Adenomatoid Malformation

Clinical History: 
36 year old woman came for routine antenatal screening. An abnormality was detected in the right hemithorax on ultrasound. An MRI was performed for better evaluation.

Congenital Cystic Adenomatoid Malformation

MR Technique: 
1.5 T scanner (Siemens Espree) using a body matrix coil.  Image 1: axial T2-weighted HASTE scan (TR/TE 1500/89 ms, scan time 53 sec, slice thickness 5 mm); Image 2: sagittal T2-weighted HASTE scan (TR/TE 1500/89 ms, scan time 49 sec, slice thickness 5 mm).

Imaging Findings:
Within the right lung base, several diminutive cystic lesions are present on the medial side. The largest of these measures approximately 5 mm in diameter and is adjacent to the trachea at the level of the bifurcation. The overall measurements of the segment affected by the cystic lesions is 2 cm X 2 cm X 1 cm.