Presentation
Known ankylosing spondylitis. Sacroiliitis?
Patient Data
Age: 50 years
Gender: Male
From the case:
Bilateral sacroiliitis - New York grade III
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Bilaterally blurred sacroiliac joint line with periarticular sclerosis, and widening. Findings correspond to New York grade III sacroiliitis.
Incidentally the left L5 transverse process is enlarged and forms a pseudoarticulation with the massa lateralis sacri (Castellvi IIa lumbosacral transitional vertebra).