SUMMARY The liver in children contains a greater amount of connective tissue in relation to parenchymal tissue than in adults and there is often more in the left than in the right lobe. Livers from 150 children who died between birth and 12 years of age, under different circumstances, were studied.The findings suggested that hypoxia was an important factor leading to increase in fibrous tissue in children's livers. Children who had cyanosis at birth and prolonged hypoxia associated with pathological conditions showed the highest ratio of connective tissue to liver parenchyma. The predominant non-hepatic lesions found were cyanotic congenital heart disease, coarctation of the aorta, acute respiratory distress, congenital malformation of the central nervous system, and shock after abdominal surgery.The liver consists of two physiological lobes which differ from the anatomical demarcation (Cantlie, 1897(Cantlie, -1898Mall, 1906). Asymmetrical changes in two lobes of the liver have been noted in infancy (Emery, 1955) and foetal life (Gruenwald, 1949;Emery, 1963) and have been related to the differing vascular pattern in intrauterine and in postnatal periods.The connective tissue content of children's livers is significantly higher at all times and more marked in the left than in the right lobe (Ghosh and Emery, 1970), and it was suggested that the quantity of fibrous tissue might be related to the degree and duration of shock and hypoxia in the neonatal period and childhood. The present study was carried out in order to assess the possible effect of hypoxia on the production of hepatic fibrosis.
Material and MethodsIt is customary in this hospital to take controlled sections from the left and right physiological lobes of the liver and the paired sections are filed serially.The slides are stained by Masson's trichrome. Three thousand five hundred paired sections were drawn out randomly, surveyed, and sections were selected which showed an obvious increase of connective tissue content and a distinct difference between the left and right lobes. Controls were selected by taking