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A 26-year-old female with a history of intramuscular nonsteroidal antiinflammatory drug injection to her left dorso-gluteal region in a primary healthcare unit six months ago, for her back pain. During the injection she documented severe pain and numbness on her left leg. On admission to MRI, she was using a brace for her foot drop. On axial fat-saturated T2-weighted image through the greater sciatic foramen, SN segment is hyperintense (arrow) compared with the right side.
