Chemosurgical Debridement of Osteomyelitic Bone by Zinc Chloride Fixative

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Abstract
Zinc chloride fixative (as described in fixed‐tissue Mohs surgery) is useful as a chemical debridement method for osteomyelitic bone. We describe a case of an 86‐year‐old female with a 67‐year history of an osteomyelitic ulcer of the anterior tibia. Previous attempts at surgical extirpation of the bone followed by immediate or delayed repair by orthopedic and plastic surgery services had eventuated in recurrence of the basic osteomyelitic process. Below‐the‐knee amputation was recommended as the only alternative to treatment. However, we chose to apply zinc chloride fixative which penetrated the full thickness of cortical bone and revealed a wider and deeper extent of the infectious process than previously recognized. Following removal of the fixed bone, a muscle flap repair followed by split‐thickness skin grafting was done by plastic surgery. The patient remains ulcer and symptom free 31 months postopera‐tively. We feel zinc chloride fixative is useful as an adjunct to other surgical means of extirpation of bone as it is tissue sparing and more accurately determines the extent of involved bone when infected.

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