These days, the line between Hip Hop and pop is nearly invisible. In many cases, rap artists routinely drive the sound and the success of global pop culture. At the same time, pop stars have long ...

A 62-year-old woman presents with 3 months of left shoulder pain. X-rays show osteonecrosis of the humeral head with advanced arthritis in the glenohumeral joint. A 46-year-old man presents to the ...