Osteomyelitis, acute, subacute, or chronic

Inactive, following repeated episodes, without evidence of active infection in past 5 years

With discharging sinus or other evidence of active infection within the past 5 years

With definite involucrum or sequestrum, with or without discharging sinus

Frequent episodes, with constitutional symptoms

Of the pelvis, vertebrae, or extending into major joints, or with multiple localization or with long history of intractability and debility, anemia, amyloid liver changes, or other continuous constitutional symptoms