Which statement is most accurate regarding chronic osteomyelitis?

• A. It presents with rapid acute symptoms.
• B. It shows sequestrum formation.
• C. It occurs only in institutionalized patients.
• D. It is typically associated with draining sinus and sequestrum formation.

Answer: (D)

Chronic osteomyelitis is defined by a long-standing bone infection in which dead bone (sequestrum) persists and new bone forms around it (involucrum), often with a draining sinus tract to the skin. The draining sinus reflects the body's attempt to expel chronic infection, and sequestrum formation is a hallmark sign that necrotic bone remains as a persistent focus for bacteria. This combination—draining sinus plus sequestrum—is the most characteristic description of the chronic form.

Rapid, acute symptoms belong to acute osteomyelitis, not the chronic condition, and the disease is not limited to institutionalized patients—it can occur in anyone with risk factors like trauma, diabetes, or vascular compromise. Sequestrum formation can occur in chronic disease, but the presence of a draining sinus makes the statement a more complete and accurate reflection of typical chronic osteomyelitis.