We present a 15-month-old girl with tetraploidy and compare the manifestations with those of 3 previously reported liveborn infants with the same type of polyploidy. Common anomalies noted included micro-turricephaly, a prominent but narrow forehead, microphalmia or anophthalmia, limb anomaly, sacral meningomyelocele, and mental retardation.
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Shiono et al. (1988) studied this question.
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