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The ultrasonographic study through the fontanelle of 192 children below 33 weeks of age and surviving after the neonatal period led to the diagnosis of leukomalacia by identifying anechogenic cavities in the periventricular area in 7 cases. Clinical pictures were not characteristic. Important electro-encephalographic changes were constantly found, even before the occurrence of sonographic signs. Although non specific they are still suggestive when associated hemorrhage is not present. With these criteria, diagnosis seems to be correlated with severe neurologic prognosis. Its interest and chronology warrant the extension of the ultrasonographic supervision of severely immature infants up to the end of the second month.

A retrospective study of 182 children with birth weights less than or equal to 2,000 gms was undertaken. Its analysis showed that heterogeneity in discharge weights (1,580 to 3,400 gms) corresponded to an homogeneous average gestational age, around 39 weeks. Low discharge weights were neither correlated with the pathology of the first days, nor with the socio-economic status of the family. The majority were children born with intra-uterine growth retardation, who mature more rapidly and who might be given to their families earlier, with lower weights. There was no correlation between discharge weight and a second hospitalization during the first year. A policy of "early" discharge did not seem to have disadvantages, while its advantages are unquestionable.