Gustilo-Anderson classification of open fracture wounds. A, Type I open fracture of patella and type II open fracture of tibial shaft. B, Type IIIA open fracture with extensive laceration of skin and muscles that involves almost entire leg. C, Type IIIA open tibial fracture with extensive periosteal stripping but without massive contamination. D, Type IIIB open fracture of tibia stabilized with external fixation. E, Type IIIC fracture of proximal third of humerus.