Prenatal ultrasound and magnetic resonance imaging of fetal intralobar sequestration at 29 weeks of gestation

(A) Axial ultrasound demonstrates a high-signal mass in the right lower lobe.
(D) Doppler examination shows a dominant vessel originating from the thoracic aorta and coursing to the mass.
(B) and (C) T2-weighted MRI demonstrates a large, echogenic mass in the right lower lobe with mild mediastinal shift to the left; (B) axial and (C) coronal views. The congenital pulmonary airway malformation volume ratio is 0.8, indicating a low risk for hydrops.