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Dagger sign is a radiologic sign seen in advanced cases of ankylosing spondylitis. [1] The appearance of a dagger is seen in the X-ray because of ossification of the supraspinous and infraspinous ligaments. [2] As a result, a central dense line of sclerosis, resembling a dagger can be seen in the AP radiograph of spine and pelvis. [3]
Ankylosing spondylitis (AS) is a type of arthritis from the disease spectrum of axial spondyloarthritis. [5] It is characterized by long-term inflammation of the joints of the spine, typically where the spine joins the pelvis. [2] With AS, eye and bowel problems—as well as back pain—may occur. [2]
The first MR images of a human brain were obtained in 1978 by two groups of researchers at EMI Laboratories led by Ian Robert Young and Hugh Clow. [1] In 1986, Charles L. Dumoulin and Howard R. Hart at General Electric developed MR angiography, [2] and Denis Le Bihan obtained the first images and later patented diffusion MRI. [3]
In radiology, a Romanus lesion is the erosion of the anterior and posterior vertebral endplates in patients with an inflammatory spondyloarthropathy – such as ankylosing spondylitis or an enteropathic arthropathy.
Microscopically visible ileal inflammation is seen in about 50% of people with spondyloarthritis and ankylosing spondylitis during ileocolonoscopy. [11] [4] There seems to be an immunological connection between the gut inflammation observed in Crohn's disease and ankylosing spondylitis. [12]
Spondylitis; Spondylitis due to Tropheryma whipplei: Contrast-enhanced, T1 weighted fat suppressed magnetic resonance imaging demonstrating contrast enhancing lesions of spondylitis in the first (L1) and second (L2), as well as fourth (L4) and fifth (L5) lumbar vertebra, sparing the intervertebral discs: Specialty: Rheumatology: Diagnostic method
Since the disease ankylosing spondylitis was still defined by the Modified New York criteria of 1984, there was the need to find a new disease term that would also include the less severe forms or early onset of ankylosing spondylitis. This expression was found in the umbrella term axial spondyloarthritis.
Prior disease including ankylosing spondylitis, [5] [9] autoimmune vasculitis, [2] and Guillain-Barré syndrome [2] have been known to cause arachnoiditis. Chemical causes include morphine, [ 10 ] myelograms with oil-based radiographic contrast agents, [ 10 ] phenolic solutions, [ 11 ] chlorhexidine, [ 12 ] epidural injection of steroids and ...
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