in addition , assessment of the abnormal phenotypic features and the data of other ( laboratory , x-ray , etc . ) examinations revealed 25 ( 3.6 % ) single gene disorders , 25 ( 3.6 % ) recognizable syndromes or associations of unknown aetiology , and in 4 cases ( 0.6 % ) environmental agents were established as possible aetiological factors .
C0012634
disorders
C0039082
syndromes