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Congenital Abnormalities

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Microcephaly » Head Q02.-


A congenitally small cranium, defined by an occipito frontal circumference (OFC) 3 standard deviation below the age and sex appropriate distribution curves. Excl. microcephaly associated with anencephaly [Q00.-] or cefaphocele [Q01.-].


If a different threshold is used (ex. 2 standard deviations), it should be specified.


Image 1: 3 cases with microcephaly. Image 5 and 6: Front and profile view of microcephaly vera, the skin is redundant in the neck and ear appears to be large relative to the skull.