Which finding helps differentiate piriformis syndrome from lumbar radiculopathy?

Which finding helps differentiate piriformis syndrome from lumbar radiculopathy?

• A. Positive straight-leg raise test
• B. Trigger point reproducing radicular symptoms
• C. Back pain with numbness
• D. History of trauma to the buttock

Answer: (B)

When a trigger point in the piriformis reproduces the radicular-type symptoms, it points to pain coming from a muscle trigger point rather than nerve root irritation. In lumbar radiculopathy, pain comes from nerve root compression and is typically provoked by maneuvers that tension or irritate the nerve roots (like leg-raising tests), not by palpating a hip muscle. So reproducing radicular symptoms with a piriformis trigger point supports piriformis syndrome. The other findings are less specific: a positive straight-leg raise suggests nerve-root involvement, back pain with numbness can occur for many reasons, and a history of buttock trauma isn’t diagnostic by itself.

When a trigger point in the piriformis reproduces the radicular-type symptoms, it points to pain coming from a muscle trigger point rather than nerve root irritation. In lumbar radiculopathy, pain comes from nerve root compression and is typically provoked by maneuvers that tension or irritate the nerve roots (like leg-raising tests), not by palpating a hip muscle. So reproducing radicular symptoms with a piriformis trigger point supports piriformis syndrome. The other findings are less specific: a positive straight-leg raise suggests nerve-root involvement, back pain with numbness can occur for many reasons, and a history of buttock trauma isn’t diagnostic by itself.