Furthermore, FOXF1 also plays a vital role in the development of pulmonary alveoli and vasculature, whereas any deletions or mutations in the FOXF1 gene are believed to cause alveolar capillary dysplasia with misalignment of pulmonary veins [12,13,14]. The gene discussed is FOXF1; the disease is alveolar capillary dysplasia with misalignment of pulmonary veins.