Polydactyly is a genetic condition characterized by the presence of extra fingers or toes on a person’s hands or feet. Instead of the typical five digits on each hand or foot, a person with polydactyly may have six, seven, or even more digits. The extra digits can be fully formed and functional or they may be small, non-functional nubs.
Polydactyly can be inherited in an autosomal dominant pattern, meaning that a child has a 50% chance of inheriting the condition if one parent carries the gene. In some cases, however, polydactyly can occur spontaneously as a random mutation.
Polydactyly is usually not a serious medical condition, and many people with the condition are able to live normal, healthy lives without any problems. In some cases, however, surgery may be necessary to remove the extra digits if they are causing problems with mobility or other issues.