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Obstetric US: watch the fetal hands Rypens F; Dubois J; Garel L; Fournet JC; Michaud JL; Grignon ARadiographics 2006[May]; 26 (3): 811-29; discussion 830-1Hand anomalies are difficult to diagnose and are often overlooked during prenatal ultrasonography (US). The spectrum of malformations varies from subtle finger deformities to the complete amputation of limbs. Malformations of the hand can be classified, according to the predominant anomaly, among the following categories: alignment abnormalities (clenched hand, camptodactyly, clinodactyly, hypokinesia, clubhand, phocomelia), thumb anomalies, abnormal size (macrodactyly, trident hand), abnormal echogenicity (abnormal calcifications), abnormal number (polydactyly, syndactyly, ectrodactyly), and constriction band sequence. A fetal hand anomaly has important diagnostic and prognostic implications as well as functional consequences. Malformation may be isolated but often is associated with a syndrome or karyotype anomaly. Classification and characterization of the anomaly help to narrow the differential diagnosis: Some malformations (clenched hand, hitchhiker thumb) are highly suggestive of a specific diagnosis. The detection of a fetal hand malformation warrants a complete work-up, including complete fetal and cardiac US examinations, as well as genetic counseling to determine whether familial inquiry and karyotype analysis are necessary.|Hand Deformities, Congenital/*diagnostic imaging[MESH]|Humans[MESH]|Image Enhancement/*methods[MESH]|Infant, Newborn[MESH]|Obstetrics/*methods[MESH]|Practice Guidelines as Topic[MESH]|Practice Patterns, Physicians'[MESH]|Ultrasonography, Prenatal/*methods[MESH] |
