The pulmonary tissues of a patient, born with HLHS, aortic arch hypoplasia, and valvular anomalies and developed postoperative chylothorax after aortic arch, and supravalvar aortic stenosis repair was stained for PROX1, PODOPLANIN, VEGFR2, and VEGFR3. The gene discussed is FLT4; the disease is Chylothorax.