A 21-year-old woman with irregular menses and hirsutism.

A 72-year-old man with an elevated creatinine level.

A 45-year-old woman with chronic cough and shortness of breath for months' duration.

A 39-year-old woman with one month of right upper quadrant pain.

A 46-year-old woman with a two-year history of progressive asymmetrical enlargement of the breasts.

A 28-year-old woman with abdominal pain and vomiting for the past six hours.

A 75-year-old man with worsening abdominal pain and emesis.

A 37-year-old man in a low-speed motor vehicle collision.

A 60-year-old woman undergoing a routine screening mammogram.

A 28-year-old woman with cervical spine tenderness after motor vehicle accident.

A 56-year-old woman with slow cognitive decline.

An 80-year-old man with chronic, nonspecific abdominal pain.

An 83-year-old man with chronic dysphagia and epigastric pain.

A 21-year-old woman with primary amenorrhea and pelvic pain.

A 1-year-old boy with a seven-day history of diarrhea and vomiting.

A 38-year-old woman with hypertension, abdominal distension, and a history of chronic kidney disease.

A 33-year-old woman with vaginal bleeding and pelvic cramping and a beta human chorionic gonadotropin (hCG) level of 6,819.

A 71-year-old man with abdominal pain, fever, and diarrhea.

A 56-year-old man with alcohol abuse and hepatitis B now with liver failure.

A 70-year-old male ex-smoker with repeated episodes of hemoptysis.