Cierny-Mader classification of chronic osteomyelitis has two components: anatomical type and physiological class. A host classified as Class B-L in the Cierny-Mader system indicates:

• A Normal host with medullary osteomyelitis
• B Systemic compromised host (e.g., diabetes, malnutrition, renal failure) with systemic immune compromise
• C Combined local and systemic compromise
• D Local compromised host (e.g., vascular insufficiency, scarring, radiation) with locally impaired wound healing ✓

Explanation

Cierny-Mader classification: Anatomical Type: I = medullary, II = superficial, III = localized, IV = diffuse. Host Class: A = normal, B-L = locally compromised (local vascular disease, scarring, radiation damage), B-S = systemically compromised (diabetes, chronic illness, immune deficiency), B-LS = both, C = treatment worse than disease. Class B-L specifically refers to local compromise where the local wound healing environment is impaired but systemic immunity is intact. The host class directly influences surgical decision-making — Class C hosts may be managed non-operatively since the risk of surgery outweighs benefit. Treatment of chronic osteomyelitis requires debridement, dead space management, vascular reconstruction, and antibiotic therapy.

Reference: Maheshwari Essential Orthopaedics, 6th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.