RESUMO
Drimary fetal hydrothorax(DPHT)is an uncommon congenital disease. Petal hydrothorax is thought to be due to leakage of lymphatic fluid in the pleural space either caused by direct leakage of lymphatic fluid from the thoracic duct,overproduction or impaired drainage of lymph. The outcome of fetal hydrothorax may vary from spon_taneous resolution without postnatal morbidity to severe fetal hydrops and perinatal death. At present,there is no consen_sus on the treatment of DPHT. Now,the latest researches progress on prenatal ultrasonographic characteristics,prenatal diagnostic procedures,prenatal intervention,and prognosis in DPHT,were reviewed combined with the diagnosis and treatment principle of single center in Guangdong Women and Childrenˊs Hospital,which would provide useful guidance for clinical treatment of DPHT.