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Contrast-enhanced CT scan performed at the time of diagnosis in December 2009. (a) Presence of a large mass arising from an osteochondroma (arrow) of the left iliac bone (coronal plane, bone window, venous phase); (b) the primary tumour appears as a poli-lobulated mass extending within the pelvis, characterised by an irregular, peripheral contrast enhancement and scattered calcification islets (circle) (axial plane, abdomen window, arterial phase).
