Adult calcaneal osteitis: incidence, etiology, diagnostics and therapy.

Calcaneal osteomyelitis presents a complicated situation. The specific anatomy of the os calcis and its surrounding soft tissues plays an important role in the planning and realization of the procedures needed in order to eradicate the osteomyelitic focus. The calcaneus represents a spongious bone; a fact that supports the developement of an osteomyelitis. It is the strongest bone of the foot and is highly important for the biomechanical features of physiological walking. The surrounding soft tissues are thin and contain various important anatomical structures. These might be damaged during the treatment of the osteomyelitis. In addition the vascularization of the os calcis is delicate and may be compromized during the surgical osteomyelitis treatment. Calcaneus osteomyelitis may be classified based on the routes of infection into exogenous and endogenous forms. Additionally from the clinical point of view acute and chronic forms may be distinguished from an early and a late infection. Exogenous calcaneal osteomyelitis mostly is the result of an infection with S. aureus. The treatment is equal to the therapy in other locations and based on: Eradication of the bone infectionSanitation of the soft tissue infectionReconstruction of bone and soft tissue Especially the preservation and restoration of the soft tissue is important. Thus plastic surgical procedures play an essential role. The main object of treatment is the preservation of a biomechanical functioning foot. This may be impossible due to the local situation. Calcanectomy or even below knee amputation may be needed in those cases.