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CHAPTER 14 III The Wing: Infections 143

Figure 14-1 • Close-up view of the distal ulna of a crow after repair of a closed comminuted fracture shows a severe surgical infection that
resulted in the devitalization of much of the distal ulna, including the lateral half of the condyle, which has become detached. There is
almost no purposeful callus formation, that is, there is no new bone crossing the now widely separated fracture fragments. A large amount
of inappropriate new bone, which provides no fragment stabilization, has been lain down along the originally unaffected portion of the ulna,
nearly reaching the elbow joint. A faint cloak of new bone has also developed around the distal radial shaft, signaling the further spread of
the infection. The fracture fragments have moved away from the pin rather than the other way around, which is typical of fractures

reduced with a snugly fitted intramedullary pin that subsequently become infected,

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