Punch grafting is a popular surgical technique for vitiligo treatment.  Tiny bits (1,5mm diameter) of full thickness skin are removed from a donor area such as the thighs, using a device called a biopsy punch.  At the same time, equal sizes of holes are made in the recipient area (the white patch of vitiligo being treatmed), about 0,5cm apart.  The puched out pieces of skin from the donor area are then transplanted into the recipient area.  About 30 grafts can be easily inserted at one sitting.  The process may be repeated to treat larger areas.