Abstract
Hydatid disease of the liver is a common endemic parasitic condition which prevails in areas of the world where pastoral industry is well developed, and allegealy affects both animals and man. It is commonly found in northwestern provinces of China. A total of nine hundred patients with unilocular hydatid disease had been treated by surgical operation in our hospital between 1953. and 1982, of these, 650 were cases with hydatid cysts in the liver. The diagnosis and treatment of the series of 650 cases is briefly described as follows.