期刊
JOURNAL OF CLINICAL MEDICINE
卷 12, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/jcm12031039
关键词
imaging diagnostics; axial spondyloarthritis; magnetic resonance imaging; diagnosis; differential
The diagnosis of axial spondyloarthritis (axSpA) is based on imaging and clinical findings due to the lack of diagnostic criteria. MRI of the sacroiliac joints (SIJ) has increased the frequency of axSpA diagnoses, especially in women, due to the presence of non-specific subchondral bone marrow edema (BME). Awareness of other differential diagnoses and understanding of relevant MRI and clinical features are important to accurately diagnose axSpA.
The diagnosis of axial spondyloarthritis (axSpA) is usually based on a pattern of imaging and clinical findings due to the lack of diagnostic criteria. The increasing use of magnetic resonance imaging (MRI) of the sacroiliac joints (SIJ) to establish the diagnosis early in the pre-radiographic phase has resulted in a shift in the paradigm with an increasing frequency of axSpA diagnoses and a changed sex distribution. Non-radiographic axSpA affects males and females nearly equally, whereas ankylosing spondylitis predominantly occurs in males. The MRI-based increasing frequency of axSpA in women is mainly due to the presence of subchondral bone marrow edema (BME) on fluid-sensitive MR sequences, which may be a non-specific finding in both women and men. Due to the somewhat different pelvic tilt and SIJ anatomy, women are more prone than men to develop strain-related MRI changes and may have pregnancy-related changes. Awareness of non-specific subchondral BME at the SIJ is important as it can imply a risk for an incorrect SpA diagnosis, especially as the clinical manifestations of axSpA may also be non-specific. Knowledge of relevant MRI and clinical features of differential diagnoses is needed in the diagnostic workout of patients with suspected axSpA considering that non-SpA-related SIJ conditions are more common in patients with low back or buttock pain than axSpA sacroiliitis. The purpose of this review was to present current knowledge of the most frequent differential diagnoses to axSpA sacroiliitis by MRI taking the clinical characteristics into account.
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