Cierny and Mader Classification For Osteomyelitis

Anatomical type:
• Type I, Medullary: osteomyelitis is confined to the medullary cavity of the bone.
Hematogenous osteomyelitis and infections in the presence of an intramedullary rod
are examples of this stage.

• Type II, Superficial: involves only the cortical bone and usually originates from a
direct inoculation or a contiguous focus infection. Typically seen from pressure ulcers

• Type III Localised: usually involves both cortical and medullary bone. And the bone is stable. Typically seen after internal fixation with plates.

• Type IV, Diffuse: Infection is throughout the bone in segmental fashion and results in axial instability. Typically seen in extensive infections or after aggressive debridement of type III infections that results in loss of axial stability.

Physiological type
• A host: Normal immunocompetent
• B host: Compromised local or systemic factors that compromise immunity
• C Host: Prohibitive minimal disability, prohibitive morbidity anticipated, poor prognosis for cure