- Baastrup’s disease is due to abnormal contact between adjacent spinous processes) and can be a cause of back pain.
- It’s generally in an older age group and most commonly in the lower lumbar spine.
- The imaging features can be seen on both CT and MRI and in this post we look at the CT findings in Baastrup‘s disease.
- Apposition of spinous processes: Narrowing of the interspinous distance (Yellow arrow) of adjacent spinous processes that appear very close together or touch (also known as "kissing spines").
- Broadening of the spinous processes: The apposing surfaces of the spinous processes broaden and flatten (Green arrows).
- Contact and approximation between the adjacent spinous processes (compare with level above).
- Sclerosis and subcortical cysts formation at the spinous process.
- Coronal CT demonstrating.
- Osteophyte formation (Orange arrow) at the margins of the spinous processes (these are best seen on coronal reformats).
- Subcortical cysts (Purple arrows).
- Narrowing of the interspinous space (Yellow arrow).
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