The young athlete is otherwise healthy but his ECG tracing and family history may suggest a different story.

Blepharitis caused by lice; lung cancer in former smokers; infection in chronic kidney disease. . . . here: 5 questions on 5 different disorders to challenge you again this week.

Pain has a wide variety of presentations, often making the diagnosis a significant challenge. Test your knowledge of signs and symptoms in this week's photo quiz.

Here: 5 cases submitted by your colleagues: see if you know what the findings in each case indicate.

The topics this week range from superficial to visceral, and from head to spleen. See if you can answer all 5 questions.

Discitis, a bacterial infection within the vertebral disc, typically results from seeding during an episode of bacteremia.

A 46-year-old man with a history of HIV infection presents to the emergency department for left flank pain. A lateral x-ray film of the patient’s lumbar spine is shown. What is the diagnosis?

Bites from various bugs can resemble one another and cause symptoms similar to those of a variety of disorders. Test your knowledge in this week's photo quiz.

Obesity, a health hazard in its own right, is linked with heart disease, diabetes, and a wide range of other clinical concerns. This week’s photo quiz offers a variety of presentations to test your diagnostic acumen.

Only one agent can be used for anticoagulation in individuals with mechanical valves.

A wide range of disorders show up in the feet, and patients often turn to their primary care physician to find the diagnosis. This week's photo quiz offers several presentations to test your knowledge.

What is single most appropriate diagnostic test when you suspect restless leg syndrome?

6 sexually transmitted infections-6 decisions. Test your skills.

Has this teen been abused? Cast your votes and see if you’ve answered this and the 4 other questions in this week’s quiz correctly.

Some of the signs of infection are pathognomonic, but not many, so careful patient evaluation often is needed. This week's photo quiz offers a variety of presentations to test your diagnostic acumen.

Multiple itchy red bumps on a man’s ankles; relative contraindications to lumbar puncture; stroke in an addict. . . 5 more questions for you to test the breadth of your clinical knowledge.

Conditions unique to women are relatively well known. But, are you familiar with the range of diseases that affect both sexes but are seen more often in women? This week’s photo quiz tests your knowledge of a variety of disorders you’ll find more often in your female patients.

Which of these GI and skin lesions should you worry about most? Is rhabdomyolysis usually the result of infection? See how well you do with this week’s questions. . .

Early identification of childhood disorders is essential for achieving the best possible outcomes. This week’s photo quiz tests your ability to recognize some of the possible presentations.

Angiofibromas and neoplasms? CRP as a marker of depression? Colorectal metastases? Can you answer all 5 of this week's questions?