A 65-year-old man complains of pain in his left shoulder that radiates toward his abdomen every time he mows the lawn or works out in the yard. Every time he rests, the pain goes away. What is the likely diagnosis? What medication will likely be prescribed? If eventually he finds that rest or the prescribed medication did not relieve symptoms, what condition is likely developing? In addition, you must indicate which Nuclear Medicine scan/s will help to determine a diagnosis, prognosis, and/or treatment (if applicable) and what will the scan look like?