A 39-year-old man with several months of abdominal pain, now with acute worsening.

An 83-year-old woman with a history of prior tobacco use and pulmonary mycobacterial infection.

A healthy 15-year-old boy with a two-week history of a persistent, productive cough.

An 80-year-old man with altered mental status and new-onset seizure one week after a fall.

A 38-year-old man with history of prior left-sided stroke who experienced an episode of sudden unresponsiveness.

A 45-year-old woman with sudden-onset epigastric pain, nausea, and vomiting.

A 45-year-old woman with several days of dyspnea and fever.

A 77-year-old woman with right-sided abdominal pain.

A 38-year-old woman immediately postoperative with shortness of breath.

A 28-year-old man with acute worsening of scrotal swelling.

A 19-year-old man with shortness of breath and a sore throat.

A 52-year-old man with increasing abdominal pain.

A 22-year-old woman with bilateral neck swelling and difficulty swallowing.

A 5-year-old girl with headache and progressive gait abnormality.