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(A,B): Bone marrow oedema (BMO) signs at both SIJ. (A) hypointense signal at the sacral and iliac superior and inferior third region of both right and left SIJ in sequence T1. (B) corresponding iperintense signal at the sacral and iliac superior and inferior third region of both right and left SIJ in sequence STIR. The written informed consent was obtained from the individual for the publication of these images.
