Question:
On radiological investigation Bamboo spine is typically seen in
On radiological investigation Bamboo spine is typically seen in
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Think of the HLA-B27 linked disease that fuses the spine over time.
Updated On: Jul 7, 2026
- Reiter's syndrome
- Ankylosing spondylitis
- Psoriatic Arthritis
- Gout
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
We need the disease in which X-rays of the spine classically show a bamboo spine appearance.
Step 2: Key Formula or Approach:
A bamboo spine forms when the small joints and ligaments of the spine become fused by new bone, so the spine looks like a series of bamboo segments stacked together. This is caused by a chronic inflammatory arthritis of the spine, a spondyloarthropathy, that progressively ossifies the spinal ligaments.
Step 3: Detailed Explanation:
Ankylosing spondylitis is a seronegative, HLA-B27 associated spondyloarthropathy that inflames the sacroiliac joints and the spine. Over years, the inflammation leads to ossification of the annulus fibrosus and the anterior and posterior longitudinal ligaments, forming bridging syndesmophytes between vertebrae. On X-ray this gives the classic bamboo spine appearance, with the entire spine looking rigid and fused.
Reiter's syndrome (reactive arthritis) can cause sacroiliitis and spinal changes, but it is usually asymmetric and milder, and does not typically progress to the fully fused bamboo spine picture seen in ankylosing spondylitis.
Psoriatic arthritis affects the spine less predictably and more often shows asymmetric, chunky, non marginal syndesmophytes rather than the smooth, symmetric bamboo pattern.
Gout is a crystal deposition disease that mainly affects peripheral joints, classically the first metatarsophalangeal joint, and produces punched out bone erosions with overhanging edges, not a fused bamboo spine.
Step 4: Final Answer:
Ankylosing spondylitis is the disease classically associated with the bamboo spine sign on spinal X-ray.
We need the disease in which X-rays of the spine classically show a bamboo spine appearance.
Step 2: Key Formula or Approach:
A bamboo spine forms when the small joints and ligaments of the spine become fused by new bone, so the spine looks like a series of bamboo segments stacked together. This is caused by a chronic inflammatory arthritis of the spine, a spondyloarthropathy, that progressively ossifies the spinal ligaments.
Step 3: Detailed Explanation:
Ankylosing spondylitis is a seronegative, HLA-B27 associated spondyloarthropathy that inflames the sacroiliac joints and the spine. Over years, the inflammation leads to ossification of the annulus fibrosus and the anterior and posterior longitudinal ligaments, forming bridging syndesmophytes between vertebrae. On X-ray this gives the classic bamboo spine appearance, with the entire spine looking rigid and fused.
Reiter's syndrome (reactive arthritis) can cause sacroiliitis and spinal changes, but it is usually asymmetric and milder, and does not typically progress to the fully fused bamboo spine picture seen in ankylosing spondylitis.
Psoriatic arthritis affects the spine less predictably and more often shows asymmetric, chunky, non marginal syndesmophytes rather than the smooth, symmetric bamboo pattern.
Gout is a crystal deposition disease that mainly affects peripheral joints, classically the first metatarsophalangeal joint, and produces punched out bone erosions with overhanging edges, not a fused bamboo spine.
Step 4: Final Answer:
Ankylosing spondylitis is the disease classically associated with the bamboo spine sign on spinal X-ray.
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