Li J, Sheng B, Liu X, et al. - Researchers retrospectively analyzed a total of 170 knees of 140 individuals with patellar tendon-lateral femoral condyle friction syndrome (PLFFS) (PLFFS group) utilizing MRI data for a 4-year period from their database in order to discover the association among PLFFS and the morphological features of the anteroinferior part of the lateral femoral condyle (ALFC) to examine the potential pathogenesis. They measured the insall–Salvati ratio, the shape of the ALFC, lateral femoral condyle angle (LFCA), lateral trochlear length (LTL), and lateral trochlear height (LTH) on MRI. In contrast with the pure patella alta group, LFCA was notably lower in the PLFFS group. The shape of the ALFC was notably varied in these two groups, whereas the Insall–Salvati ratio, LTH, and LTL exhibited no meaningful difference. The authors suggest that the PLFFS was associated with the morphological features of ALFC. Perhaps the sharp shape of ALFC was a significant causative co-factor along with the patella alta in the pathogenesis of PLFFS.