During our medical activity, we would necessarily be confronted with sport related complaints. Most of the diagnosed pathologies belong to the inflammation category and other traumas. However, as we will see in this review, we sometimes discover musculoskeletal tumours from different origins. One should never underestimate non-developing or slowly developing conditions among athletes, and to keep in mind a possible oncologic diagnosis. A critical assistance for diagnosis is given by the medical imagery with MRI being the leading technique. The aim is to avoid any delay in making the correct diagnosis, and therefore to avoid a more severe prognosis that would lead to a more radical surgery for either benign or malign tumours.