Supernumerary digit, also known as polydactyly, is the most common digital defect of the upper and lower limbs. It is grouped into three types, namely postaxial or ulnar, preaxial or radial, and axial or central. Each type of polydactyly is caused by a fixed gene and exhibits ethnic differences. The primary aim of this chapter is to highlight the occurrence, diagnosis and management of polydactyly. Polydactyly may be associated with certain congenital defects, such as Trisomy 13, Ellis-van Creveld and Smith-Lemli-Opitz syndromes, to name a few or may occur in isolation. Polydactyly can be diagnosed as early as 9 weeks of intrauterine life. If Polydactyly is detected in fetus, the developing child should be screened for associated congenital anomalies so that appropriate advice and counselling may be provided to parents. The management of this medical condition is very important as a child with polydactyly becomes conscious of the digital anomaly, he is put to emotional stress because he starts comparing the appearance of his hand/foot with that peers and may undergo depression and may not mix with other children. So, detailed knowledge of supernumerary digits is very essential to clinicians.
Author(s)
Details
Rajani
Singh
Department of Anatomy, UP University of Medical Sciences, Saifai
Etawah, 206130, UP, India
Please see the book here:- https://doi.org/10.9734/bpi/aodhr/v4/5803
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