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Coccidioidal Rib Osteomyelitis

Imaging findings

CT chest shows osteomyelitis of the first rib with bony erosion, associated with a contiguous chest wall and pleural abscess showing thick enhancement and low-attenuation fluid.

Key takeaways

Disseminated coccidioidomycosis (valley fever) can cause osteomyelitis of the ribs, sternum, or vertebrae. This typically presents as a localized bone erosion with an adjacent soft-tissue abscess. Radiographically, it is identical to tuberculous osteomyelitis (Pott's disease).

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