Rhee SM, Kim MS, Kim JD, et al. - The present study was conducted to ascertain the normalization curves of the serologic markers including white blood cell (WBC) count, WBC differential for segmented neutrophil (WBC seg.), erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP) after elective shoulder surgery, and to evaluate the hematological variations among different shoulder surgeries. Researchers included a total of 77 individuals who had undergone arthroscopic rotator cuff repair (RCR, Group A), 44 patients had open RCR (Group B), and 84 patients had shoulder arthroplasty (Group C). At 2 weeks after rotator cuff repair, and at 1 month after arthroplasties, the mean CRP levels were normalized. It was reported that CRP had consistent normalized values of median, upper, and lower quartile afterward, unlike the other serologic markers. The study found higher peak levels of the inflammatory markers and thus normalized slower following more invasive surgery.