Fetus with congenital pulmonary airway malformation with pleural effusion

CPAM at 23 weeks of gestation with small pleural effusion.
(A) Ultrasound image demonstrates a small left pleural effusion (arrow) adjacent to an echogenic mass.
(B) Coronal T2w MRI confirms the presence of a small pleural effusion (dashed arrow) adjacent to a left lower lobe heterogeneous high T2w signal mass.
(C) The effusion (short arrow) continued to increase and by 28 weeks of gestation required pleural drainage.