Which radiographic signs are commonly associated with Ankylosing Spondylitis?

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Multiple Choice

Which radiographic signs are commonly associated with Ankylosing Spondylitis?

Radographic signs of ankylosing spondylitis reflect its inflammatory nature starting in the sacroiliac joints and progressing to fusion of the spine. Early on, sacroiliac joints show sclerosis and erosions that can progress toward fusion. As the disease advances, bony bridging forms along the spine ligaments, creating a uniform, fused appearance known as the bamboo spine. The trolley-track sign specifically refers to the parallel dense lines seen along the margins of the sacroiliac joints on radiographs, signaling sacroiliitis. Together, these signs—trolley-track appearance at the sacroiliac joints and bamboo spine in the spine—are classic radiographic features of ankylosing spondylitis. Other findings like osteophytes, lateral canal stenosis, or hip osteoarthritis are not as characteristic of AS and can be seen in degenerative conditions or other diseases.

Radographic signs of ankylosing spondylitis reflect its inflammatory nature starting in the sacroiliac joints and progressing to fusion of the spine. Early on, sacroiliac joints show sclerosis and erosions that can progress toward fusion. As the disease advances, bony bridging forms along the spine ligaments, creating a uniform, fused appearance known as the bamboo spine. The trolley-track sign specifically refers to the parallel dense lines seen along the margins of the sacroiliac joints on radiographs, signaling sacroiliitis. Together, these signs—trolley-track appearance at the sacroiliac joints and bamboo spine in the spine—are classic radiographic features of ankylosing spondylitis. Other findings like osteophytes, lateral canal stenosis, or hip osteoarthritis are not as characteristic of AS and can be seen in degenerative conditions or other diseases.

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