A 42-year-old woman works full-time as a data entry clerk. S…

A 42-year-old woman works full-time as a data entry clerk. She often puts in many hours of overtime. She has started to notice numbness and tingling in her right thumb, index finger, middle finger, and half of her ring finger. The numbness and tingling initially comes and goes, but after a few months, it is constantly present.  Which of the following nerves is most likely involved?

A 42-year-old male presents with a two-hour history of left-…

A 42-year-old male presents with a two-hour history of left-sided chest pain. He denies any trauma to the chest; the pain began suddenly and is worsened by taking a deep breath. On examination, his RR is 40/min and he has decreased breath sounds on the left side. Which of the following conditions is the most likely cause of his chest pain?