Multiple prior studies have demonstrated a strong association between patellar dysplasia and patellar dislocation, as well as the development of OA.[1, 2, 3, 4] Although we did not test the expression of ABCA6 in clinical specimens from OA patients, the diminished expression of ABCA6 in patellar dysplasia and patellar dislocation undoubtedly suggests its relevance in joint‐related diseases. The gene discussed is ABCA6; the disease is Patellar dislocation.