Goldberg SS, Baranek ES, Korbel KC, et al. - This case series was performed to present the outcomes of a recently introduced anatomic total shoulder arthroplasty with an ellipsoid-shaped articular surface and a unique multiplanar platform type of stemless fixation. Researchers performed a retrospective study to explore the initial cohort of patients that received an anatomic total shoulder arthroplasty applying an ellipsoid stem-free humeral prosthesis and an all-polyethylene glenoid component from the Catalyst CSR Total Shoulder System (Catalyst OrthoScience, Naples, FL, USA) over a one-year period. The study enrolled a total of 6 shoulders in 57 patients with a mean age of 73.0 years (range 60-85 years) with a mean follow-up period of 30.5 months (range 24-41 months). The results exhibited that stem-free ellipsoid humerus total shoulder arthroplasty provides very good results with high patient satisfaction, clinical improvement in all outcome measures studied, and no signs of loosening at two-year minimum follow-up.