Cierny-Mader staging of chronic osteomyelitis classifies the infection by both anatomical type and host physiological status. A patient with type III (localised — full-thickness cortical sequestrum with stable cortex) chronic osteomyelitis in a Class C host (prohibitive surgical risk or minimal disability) should be managed by:

• A Aggressive debridement, dead space management, and complex reconstruction
• B Sequestrectomy alone without dead space management
• C Immediate amputation for all Class C hosts
• D Suppressive antibiotic therapy and symptomatic management — surgery withheld because risk-benefit ratio favours non-operative care in a Class C host ✓

Explanation

In the Cierny-Mader system, the host classification determines whether surgery is beneficial: Class A = normal host; Class B = locally or systemically compromised; Class C = the patient is too ill to tolerate surgery or the disability caused by treatment would exceed that of the disease. For Class C hosts (e.g., frail elderly with multiple co-morbidities, immunocompromised patients unlikely to heal), the risk of surgical morbidity outweighs the benefit; suppressive oral antibiotics and conservative symptom management are the preferred approach. Aggressive surgical reconstruction is appropriate for Class A and B hosts where anatomy (Cierny-Mader types I–IV) permits successful intervention with acceptable morbidity.

Reference: Maheshwari Essential Orthopaedics, 6th ed.

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Written and medically reviewed by the StethoPrep medical team.