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Subject of study was the analysis of behavioral characteristics of 51 10-year-old ex-NICU patients at home and at school. Parental assessment of child behavior proved not to differ from the normative data. Teachers however reported more problematic behaviors, particularly with regard to the introverted behavior in boys. On the basis of these findings one can conclude that the prognosis for this patient group is better than expected. A plea is made for future research to focus on factors that will facilitate a more favorable behavior development.

Two boys, aged 12 and 13 years, showed relapsing periods of somnolence and excessive eating, starting after a viral illness. One of them also showed periodic disturbance of sexual impulse control. The symptomatic periods were followed by symptom-free intervals in a highly characteristic pattern. This gave the clue to the diagnosis Kleine-Levin syndrome. The cause of this syndrome is unknown, in some cases a relationship between infectious disease or traumatic brain damage has been postulated. A dysfunction of the hypothalamus and associated structures is suspected. The syndrome has a rather favourable prognosis. The symptoms can be relieved by amphetamines, methylphenidate and probably also by lithium carbonate.