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The MRI sequences demonstrate;
- subchondral bone marrow oedema with enhancement of both surfaces of the left sacroiliac joint with joint effusion, and adjacent small abscess formation
- oedematous infiltration of the ipsilateral iliopsoas, obturator internus, and piriformis muscles with swelling and enhancement of the sciatic nerve
- enhancement of the pubic symphysis in keeping with septic arthritis with osteomyelitis of the adjacent pubic bones
A small right ovarian cyst is noted.