Abstract
SUMMARY According to recommendations in radiation and mutation genetics, made in 1956 at the Copenhagen Meeting of a study group of the World Health Organization, a registration of hereditary traits and clinical syndromes is being carried out within the District of Münster, Province of Westfalia (Germany) since 1957. One of the pathological conditions included in this research program is microcephaly investigated from a clinical as well as from a genetic stand-point. The preliminary results of our study on microcephaly in man are given in this report.
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