An 81-year-old male with known shoulder osteoarthritis presents to the office for an ultrasound-guided injection of the glenohumeral joint. Prior to injection, where should the needle tip be visualized?

To improve visualization of the hip joint of an obese patient, it would be BEST to change to a probe with which of the following?

A 38-year-old woman with recent history of right shoulder subacromial impingement presents for a two-week follow-up after an anatomically guided subacromial/subdeltoid corticosteroid injection. She reports some initial, but only short-lived, improvement of her right shoulder pain and discomfort with arm elevation.
Her right shoulder X-rays are normal. What would be the MOST appropriate next intervention?

Which pathologic condition is MOST likely responsible for the etiology of shoulder pain in the patient?