A physically active boy presented with limping, left perineal pain and tenderness after a soccer match.
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Bone marrow and soft tissue oedema around the left ischiopubic synchondrosis.
Ischiopubic osteochondritis was formerly counted among the aseptic bone necroses (van Neck-Odelberg disease), but is nowadays rather considered as a stress reaction of the ischiopubic synchondrosis, that nomally ossifies before puberty. MR signal changes at the IPS in asymptomatic children of that age are considered as a normal growth phenomenon 1. The main differential diagnosis is osteomyelitis.