dr. david shapiro have seen many hand injuries. many are the result of carelessness, people trying to hurry up. >> minor ones to awful things. probably the biggest culprit, the table saw. >> dr. sha pore a said avoid -- sha peer a said avoid wearing loose fitting clothing and never remove the safety guard. >>> baseball season is here. your favorite players are on the field. none of them are as impresssive as this 13-year-old. >> reporter: dugan smith first knew something was wrong with him on the baseball field. after sliding into base he felt snore. >> there were bumps on his knees. >> reporter: it turned out to be a malignant actual morning the size of a softball. after undergoing chemotherapy, help underwent a rare and remarkable procedure. >> basically we take out the middle part of the leg, take the bottom part and leave the nerves connected. we turn the leg around backwards. >> reporter: the procedure is performed and by turning the leg around backwards, his calf muscle is acting as his thigh and his ankle as his knee. as he g