Unsuspected muscular radionuclide uptake due to chronic muscular injury contracted during sports activity.

Increased soft-tissue uptake is commonly encountered in metastases, infarction, vascular calcification, myositis ossificans, hemangiomas. In addition, injured muscles and rhabdomyolysis have an affinity for bone-seeking radiopharmaceuticals. Matin and co-workers even correlated the intensity of muscular tracer uptake with complaints in ultra-marathon runners. In this patient, however, the very intense muscular uptake, caused by repeated sport-induced injuries of a rather unusual origin, did not correlate with the complaints. Also, our case illustrates that even children are at risk for unsuspected traumatic lesions, contracted during sports or physical activity.