Ewings tumour LBSU

Description: 16 year old girl had a 6 month history of pain in the left leg, particularly when playing tennis. There is slight irregularity and thickening of the pectineal line and a subtle soft tissue mass on the left side of the pelvis with its centre of radius roughly over the left acetabulum. There is elevation of the pectineal line and some new-bone with an appearance resembling Codman's triangle (periosteal elevation ) in a long bone. This can be seen as double contour to the bone margin at the brim of the true pelvis on the Left side, on the medial side of the soft tissue mass. There is bowel gas projected over both Ilia, which obscures bone detail in this view with some photographic artifact.