Flattening of the facial profile and macroglossia (large tongue) are common postnatal findings associated with trisomy 21 ... they may serve as ultrasound markers. One study did identify an ...
Other sonographically detectable aneuploidies include trisomy 13, 18, monosomy X, and triploidy. Second-trimester ultrasound scan detects 2 types of sonographic markers suggestive of aneuploidy.
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