Prenatal diagnosis and management of fetal thoracic lesions.

There have been significant strides made during the last decade in understanding the natural history and pathophysiology of fetal thoracic lesions. Largely as a result of advances in prenatal ultrasound, we are not only able to diagnose these lesions and advise parents about prognosis, but also offer the possibility of fetal intervention for the most severely affected fetuses. However, large gaps remain in the current state of knowledge of fetal thoracic lesions. We are unable to accurately predict pulmonary hypoplasia, the most devastating consequence of fetal thoracic lesions. In lesions, such as CDH, the selection criteria for fetal intervention remain ill defined. Proof of the efficacy and superiority of fetal surgery over conventional postnatal therapies for diaphragmatic hernia await the results of prospective trials. Fetal surgery in lesions such as CCAM and BPS is currently reserved for only those fetuses with hydrops and a uniformly fatal outcome. Whether fetal surgery in these cases would be beneficial in the absence of hydrops is difficult to say especially given the possibility of spontaneous regression. During the next decade we anticipate continued growth in our understanding of these lesions, refinement in selection criteria for intervention, and advances in techniques for salvaging these severely compromised fetuses. The diagnosis and treatment of fetal thoracic lesions remains a formidable challenge, but one which can be met with cautious optimism, due to the availability of fetal interventions not previously available.