Abstract
Records of 24 pregnancies with fetal polydactyly were reviewed for the type of polydactyly, family history, associated sonographic findings, genetic testing, and postnatal/postmortem examination findings. The importance of fetal polydactyly can be mainly elucidated by the family history and absent or associated anomalies on a specialized malformation scan. Fetal karyotyping diagnoses frequent chromosomal anomalies in about half of cases with additional malformations, and array comparative genomic hybridization may be a future means of detecting cryptic chromosomal aberrations. Syndromic disorders of monogenic origin demand a careful interdisciplinary clinical assessment for establishing a clinical diagnosis and prognosis for the outcome of the child.
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