A man returns from a trip with an unwanted souvenir.

An elderly woman returns home from a balmy South Pacific vacation and finds very cold temperatures. While shoveling snow, she finds that she can't get air into her lungs. With no history of pulmonary or heart disease, what's wrong?

Vague symptoms brought this patient to the ED three times before physicians made a rare diagnosis.

A condition that seemed to be under control flares, with painful complications.

A UTI triggers complications in a patient with two forms of arthritis. Mr. G, aged 74, initially came to the ambulatory-care clinic for pain in his right shoulder and neck. The shoulder pain had started about one month earlier, when he developed a "grapefruit-sized" lump...

The patient reported a voracious appetite, but a 15-lb weight loss over the preceding three months prompted a diagnostic quest.

Hoarseness and slowed ocular movements were the first signs in a yearlong hunt for a diagnosis.

Therapy intended for one immune disorder also alleviates another.

Her discomfort could have been from inevitable arthritis, but there were signs of a different diagnosis.

Elevated liver enzymes were the first clue to a grave diagnosis.