Ortho Dx: Choose the best surgical option for these two patients

Patient A is a 70-year-old man who has been treated for several years for left shoulder pain. Intra-articular steroid injections, rest, and nonsteroidal anti-inflammatory drugs have provided short-term relief. On examination, the patient has good range of motion of the shoulder both passively and actively. Magnetic resonance imaging taken 1 month earlier shows an intact rotator ...