{'fraction_non_alphanumeric': 0.016826923076923076, 'fraction_numerical': 0.014423076923076924, 'mean_word_length': 5.619047619047619, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Antenatal sonographic findings in trisomy 18.

The clinical and sonographic findings of trisomy 18 are varied. Fifteen cases of trisomy 18 were retrospectively reviewed with attention to demonstrable antenatal sonographic features. Certain combinations of findings, particularly in the third trimester, seem highly suggestive of this diagnosis. A late antepartum diagnosis is warranted because of the poor prognosis.