(Congenital Cystic Adenomatoid Malformation (CCAM) and Bronchopulmonary Sequestration (BPS)) During routine ultrasound evaluating the fetal anatomy, occasionally a fetus is found to have an abnormal growth (mass) in the lungs. Most of the time the prognosis is excellent, but it may require a few extra steps in your natal plan. However, it’s still important to know