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AP radiograph of the pelvis reveals extensive fluffy or "whiskering" enthesopathy of the iliac crests (red arrows), ischial tuberosities (yellow arrows), and the trochanters (black arrows). Note is also made of ossification of the iliolumbar ligament (blue arrow). Importantly, both sacroiliac joints appear normal. These findings are in keeping with diffuse idiopathic skeletal hyperostosis (DISH).