A 67-year-old woman with chronic cough and multiple episodes of pneumonia.

An 11-year-old boy with months of knee pain that worsens after sports practice.

A 17-year-old boy with a midline neck mass, pain, tenderness, and low-grade fever.

A 78-year-old man with a four-week history of productive cough, occasional hemoptysis, and epistaxis.

A 31-year-old woman with intermittent pain spreading throughout her abdomen.

A 27-year-old man with right knee pain after slipping at a concert.

A 22-year-old woman with with a several-year history of globus sensation.

A 19-year-old man with a history of progressive weakness affecting the right arm.

A 74-year-old woman with epigastric pain, nausea, and vomiting.

A 43-year-old man with right facial weakness that progressed to include right arm and hand weakness, right leg weakness, and word-finding difficulty.

A 59-year-old woman with chronic abdominal pain.

A 35-year-old man with headaches, focal seizures, and confusion after coming back from São Tomé and Príncipe.

A 14-year-old girl with months of left chest wall pain.

An 82-year-old woman after a syncope episode in which she fell backward and hit her head.

A 76-year-old woman with vomiting, then fecal incontinence and food intolerance.

A 34-year-old woman with ankle pain over the past 10 months.

An 11-year-old girl with subacute foot pain after starting soccer.

A 41-year-old man with big-toe pain since a fall two weeks ago.

A 31-year-old woman with a complex medical history and two new-onset seizures.

A 73-year-old man with fever and breathing difficulties, suspected of having COVID-19.