Prentice HA, et al. - Using Kaiser Permanente's shoulder arthroplasty registry, individuals who underwent elective primary shoulder arthroplasty (n = 4,751) from 2009 through 2015 were chosen to assess whether there is a difference in the revision risk after shoulder arthroplasty in patients who also undergo a lower-extremity TJA in comparison with those who do not and whether the revision risk vary depending on the sequence of the procedures. No variation was observed in all-cause shoulder revision risk with lower-extremity TJA prior to or following the index shoulder arthroplasty in comparison with patients who underwent a shoulder arthroplasty only. Thus, in this study sample, shoulder revision surgery risk to be distinctive in patients who also underwent a lower-extremity TJA was not noted, despite the sequence of the two procedures.