We reported two cases of excessive lateral pressure syndrome (ELPS) that were suggested by the X-rays. The two cases were a 15-year-old and a 17-year-old high school students. They both complained of continueing and increasing knee pain. The roentgenograms demonstrated an elongation of the lateral pole of the patella in one case, and ossification in the lateral retinaculum in the other. These findings were considered to be suggestive findings of ELPS.
