Which condition is commonly associated with insidious onset and bilateral symptoms?

• A. Lateral disc herniation
• B. Spinal stenosis
• C. Large central disc herniation
• D. Scoliosis

Answer: (B)

Spinal stenosis involves narrowing of the spinal canal or foramina, usually from degenerative changes in the aging spine. This constriction tends to compress multiple nerve roots or the cauda equina rather than a single nerve root, so symptoms develop gradually and affect both sides. The bilateral nature comes from shared compression within the canal rather than isolated nerve-root involvement. In contrast, a lateral disc herniation typically causes unilateral radicular pain from compressing a single nerve root, a large central disc herniation can present more acutely with broader or cauda equina–type signs, and scoliosis is a structural curvature with asymmetric alignment rather than progressive bilateral neural compression.