A 22-year-old African immigrant presents to the hospital with acute abdominal pain caused by gallstones. What is their most likely composition?
A 32-year-old woman comes to the physician because of amenorrhea after delivering a baby. Which hormone is likely to show normal levels?
A 59-year-old man presents with chest pain during exercise and an ejection fraction of 55 percent. What’s the next best step in management?
A 75-year-old man has trouble emptying his bladder, an enlarged prostate and osteoblastic lesions in the vertebral bodies.
A middle-aged man presenting to the emergency department also has pale skin and loss of vibration sense. What is the most likely diagnosis?