A 60-year-old homosexual man presented to the outpatient clinic with a 3-day history of facial rash associated with pain. The rash did not affect any other part of the body. He was not currently taking any immunosuppressive medication. What’s your diagnosis?

This hypersensitivity reaction may be secondary to medications, infection, collagen-vascular disorders, or an occult malignancy. When it is localized to the skin, prognosis is excellent.

What does a broken “clock gene” have to do with Alzheimer disease? Does shift work cause heart disease? Who shouldn’t be given Zolpidem for sleep? Nocturnal problems from A to Z fill round 3 of our Sleep Disorders quiz.

Here are 5 photos of non-healing ulcers: can you make the diagnosis?

Sleep disorders can cause comorbid ills and many medical conditions can disturb the yin-yang of sleep and waking. Take our sleep quiz to find out what you know about which comes first.

The neuroscience is clear-you can’t possibly get good at multitasking. It’s a myth. Rather than keep trying to improve the “skill,” why not try something different. Read on . . .

I treated my young patient with asthma "by the book" and alienated his mother as I did so. I didn’t have the time to really listen to what she really needed from me.

A 50-year-old man wonders whether the many asymptomatic lesions he has had for “almost all my life” can be removed. What are these lesions?

Obstructive sleep apnea is associated with a spectrum of morbidity, from daytime sleepiness to increased risk for vascular disease. Early symptoms aren’t always obvious. Test your diagnostic skills with our OSA quiz.

A 62-year-old man with a persistent snoring problem presented for an oral medicine consultation. Examination revealed very slight facial asymmetry. A sagittal series of tomograms was obtained. What do these findings suggest?

There is a strange healing power in a doctor's words that has allowed doctors to be useful over the millennia even when their treatments were ineffective or harmful. Reduced fear and renewed hope are wonderful medicines.

Approximately 1 million cases of herpes zoster are diagnosed in the United States every year. Here, a refresher on the virus and a good look at the rash.

Adults who have survived childhood cancer are at high risk for serious illness but typically are not followed by an adult oncologist. You may be the first to see suspicious signs. Would you know how to proceed?

Nope. No more open-ended questions that may invite wandering answers. Who has time when the double-booked patient sits in the exam room next door?

The pain and bleeding have persisted for 2 days. She last menstruated 5 weeks ago but doubts she is pregnant. Take a close look at the ultrasound image. Your Dx?

Results of a pelvic sonogram reveal the etiology of lower abdominal pain and vaginal bleeding in a 26-year-old woman.

#6. You pray you will be diagnosed with cancer so you can get some time to sleep. Am I right?