A 71-year-old man with hearing loss, bloody drainage from the left ear, and chronic bilateral otitis media.

A 19-year-old man with three days of abdominal pain.

A 20-year-old man with persistent right distal forearm pain.

A 65-year-old woman with left lower quadrant abdominal pain and hematuria.

A 37-year-old man with a leg mass that is increasing in size.

A 45-year-old man with right lower quadrant pain and no history of appendectomy.

A 40-year-old man with chronic anemia.

A 60-year-old man with gradually worsening hoarseness.

A 19-year-old man with a painless hard lump over the lateral aspect of the right knee for the past year.

A 43-year-old woman with right-sided abdominal pain, fatigue, and weakness.

A 64-year-old woman with chest pain two days after cardiac surgery.

A 51-year-old female nonsmoker with progressive dyspnea over the past several months.

A 19-year-old man with left flank pain after ureteroscopy and urinary calculus removal.

A 70-year-old woman with a history of hypertension and hypercholesterolemia and an acute onset of fever, left-sided chest pain, cough, and dyspnea.

A 48-year-old man without significant past medical history with multiple days of worsening chest pain.

A 68-year-old woman with one hour of chest pain that radiated to the back.

A 40-year-old woman with headaches and focal neurologic deficits including numbness and tingling in her hands and feet.

A 66-year-old woman with suprapubic and back pain, diarrhea, dehydration, hyponatremia, and rectal bleeding.

A 57-year-old woman with chronic shortness of breath, worsening over the past several months.

A 76-year-old man with left scapular pain that radiated to the shoulder, axilla, and proximal left upper extremity.