Back pain with point tenderness to percussion should raise concern for which diagnosis?

• A. Fracture or infection
• B. Muscle strain
• C. Degenerative disc disease
• D. Nerve root compression

Answer: (A)

Focal tenderness to percussion over the spine points to a lesion involving the vertebral body or adjacent structures, which raises concern for a fracture or an infection such as vertebral osteomyelitis or discitis. This is because tapping the pathologic bone or nearby structures provokes pain when there is bone injury or inflammatory/infectious involvement, whereas purely muscular or degenerative processes typically do not produce localized percussion tenderness over the vertebrae themselves.

Muscle strain tends to cause tenderness in the paraspinal muscles and pain that worsens with movement rather than a crisp, localized signal when the spine is tapped. Degenerative disc disease usually presents with axial back pain and possibly intermittent radicular symptoms, not a focal vertebral percussion tenderness. Nerve root compression causes radicular pain, numbness, or weakness along a dermatomal distribution rather than a pinpoint vertebral tenderness to percussion.

So, a back pain scenario with point tenderness to percussion most strongly suggests fracture or infection, and it warrants prompt evaluation and imaging to rule out these serious causes.