POLYDACTYLY

About:

• Polydactyly/polydactylism or hyperdactyly is a birth defect in which humans and animals have supernumerary fingers or toes. In other words, a person suffering from the congenital anomaly of polydactyly will have more than five digits in a particular hand or foot.
  
  
• Prevalence: Polydactylism is reported in perhaps one or two children per 1,000 live births, and could be the most common abnormality of development seen in newborns worldwide. The defect is also seen in cats, dogs, cattle, sheep, pigs, chickens, geese, and sometimes horses.
  
  
• Cause: The defect develops during the sixth or seventh week of gestation, when an irregularity occurs in the splitting of the fingers from the hand or foot, creating an extra digit. Causes are believed to be genetic, in some cases hereditary.
  
  
• Treatment: In most cases, the extra digits can be surgically removed; the procedure gets more challenging if there is bone with the skin and tissue, and most difficult when the bone has a joint.