In the diagnosis of Osgood-Schlatter's disease both clinical and roentgenographic features must be evaluated. The information revealed by roentgenograms is often clearcut and convincing. However, it seems that anatomic variations in the tibial tubercle are too often regarded as pathologic.1 On reviewing the roentgenograms of several hundred knee joints of children, adolescents and young adults who had no clinical complaints referable to this region, we observed variations in the size, shape and manner of growth of the tubercle. Furthermore, it is important to remember that no unusual thickening of the attachment of the patellar ligament into the tibial tubercle is observed roentgenographically (fig. 1A and B). With these safeguards in mind, we attempted to establish the criteria by which roentgenographic diagnosis of Osgood-Schlatter's disease can unequivocally be made, so that anatomic variations will not be misinterpreted.
We found on examining the roentgenograms made in 106 cases2 of