Osteomyelitis typically begins as an infection in which location and how does it progress?

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Multiple Choice

Osteomyelitis typically begins as an infection in which location and how does it progress?

Osteomyelitis in the spine typically seeds the vertebral endplate from the bloodstream. The infection then breaks through the endplate into the adjacent intervertebral disc, causing discitis, and can spread to an adjacent vertebral body, leading to loss of disc space. This anterior subchondral endplate-to-disc-to-vertebral body sequence is the classic pattern of progression. Infections starting in the posterior arch/spinous processes are not the usual route for hematogenous vertebral osteomyelitis, and isolated facet joint infection describes a different, facet-centered process without disc involvement. Disc infection without vertebral involvement is unlikely in adults because the disc is relatively avascular and vertebral bodies are typically seeded first before the disc becomes involved.

Osteomyelitis in the spine typically seeds the vertebral endplate from the bloodstream. The infection then breaks through the endplate into the adjacent intervertebral disc, causing discitis, and can spread to an adjacent vertebral body, leading to loss of disc space. This anterior subchondral endplate-to-disc-to-vertebral body sequence is the classic pattern of progression.

Infections starting in the posterior arch/spinous processes are not the usual route for hematogenous vertebral osteomyelitis, and isolated facet joint infection describes a different, facet-centered process without disc involvement. Disc infection without vertebral involvement is unlikely in adults because the disc is relatively avascular and vertebral bodies are typically seeded first before the disc becomes involved.

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