ABSTRACT
A 38-year-old, G4P0A3 Caucasian woman undergoes a prenatal ultrasound at 23 weeks of gestation, which demonstrates a left pulmonary mass in a female fetus. The patient had two prior elective pregnancy terminations and a spontaneous abortion due to blighted ovum at 8 weeks. She is otherwise well. On ultrasound, the mass appears to be located in the left lower lobe, consists of cysts of variable sizes, and measures 22.9 × 17.3 × 10.3 mm. The ultrasound images are shown in Figure 9.1.
