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Musculoskeletal System ORGAN SYSTEMS

Polydactyly or hyperdactyly

Cover image: A 39-year-old man presented for evaluation of his acne. He had no notable medical history and was taking no medications. Physical examination revealed an incidental finding of six functional digits on his hands and feet. He had no family history of similar findings. Bilateral polydactyly of the hands and feet is rare. The extra digit can be postaxial (occurring along the ulnar aspect of the hand or fibular aspect of the foot), preaxial (occurring along the radial aspect of the hand or tibial aspect of the foot), or central (occurring in the middle of the hand or foot). Polydactyly can occur by itself, typically as a manifestation of autosomal dominant mutations, or in conjunction with a syndrome of congenital anomalies. This patient did not have any additional congenital anomalies associated with the bilateral postaxial polydactyly. No treatment is required for the condition, but surgical removal for cosmesis and comfort is feasible. | Kapoor, R., & Johnson, R. A. (2011). Polydactyly. New England Journal of Medicine, 365(22), 2122. https://doi.org/10.1056/NEJMicm1100857

Supernumerary fingers and/or toe.

 

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