Skin Diseases

The solitary, keratotic lesion has grown quickly over one month. Infection? Neoplasia? What else is in your differential diagnosis?

Actinic keratosis and squamous cell carcinoma often are clinically indistinguishable. Get tips on what to look for and how to treat.

An 82-year-old woman presents for evaluation of an ear lesion--and receives a complete skin exam. Can you identify the 3 other lesions found?

What is this 6-mm shiny nodule on the face of a fair-skinned woman with moderate-to-severe photo damage?

Primary care physicians will see many patients with early signs of nonmelanoma skin cancers. Test your visual diagnostic skills in this series.

Look closely at this eruption and consider its distribution. Is the dermatology clinic seeing a "textbook" case here? What's your diagnosis?

The lesion, seen first more than 10 years ago, is larger and has changed. It has not been followed. Your Dx? Next steps?

This serious symptom constellation is seen in a 21-year-old man. Is it familiar to you?

The diagnosis of trichotillomania seemed certain, despite lack of supporting history. It turned out to be about 50% wrong.

A 10-month history of progressive swelling below the knee makes this 12-year-old's case an ideal stop on the medical mystery tour.

It looked very much like dermatomyositis, but there were no signs of muscle weakness. What would be in your differential diagnosis?

A compressible groin swelling is the only abnormal feature after full-term gestation and unremarkable delivery. Your Dx?

The 16-year-old is upset by a new outbreak of “acne” and the prom is in 2 weeks. But is it acne? And what’s that bruise?

A young naval recruit presents with a cluster of symptoms that may sound familiar. Get more clues and a close look at the rash, here.

Onset of illness was acute; fever is high and rash is widespread. Exam is performed in isolation. Your Dx?

This pop quiz will test your knowledge of a difficult diagnosis where the signs and symptoms may seem unrelated.

Brothers present with residual findings from a bad bout of lower GI distress. Their tongues will speak for themselves. What's your Dx?

An 8-year-old boy was seen in the ED for sudden, extreme tenderness of the soles of his feet. He now sees you, in primary care.

Take this brief quiz to test your knowledge of skin diseases that may occur on and around the face.

The teen presents for an annual physical. You note asymmetric papular lesions that cover his trunk. What is your diagnosis?

A few days after a homecoming party a 17-year-old girl presents with a pruritic rash at her waist and on her upper arms. What went on?

A teen’s pigmented fingernail was not a cause for alarm but did present a teaching opportunity. Take this brief quiz to test your knowledge.

Get an upfront view of irritating dermatologic conditions that often occur on and around the face.

What is the cause of the severe, diffuse inflammation of skin, joints, and mucous membranes in this Persian Gulf patient?

Topical steroids and antifungals have not only failed to resolve the bilateral rash; the teen says they’ve made it worse. Your Dx?

Bilateral tiny lumps in a 4-month-old boy's heels are making his mother anxious. Get a close look at the lesions and enter your Dx.

A 32-year-old man visits the ED for an oral canker sore that should have run its course but is getting worse. What one question should you ask?

A young teen presents with an acne outbreak that is uncharacteristic for her. What are the clues to the diagnosis in the PMH?

A young athlete presents with multiple moles on his chest and back. What’s a primary care physician to do? Test your knowledge with this quiz.

What's the matter with these kids? Get a close look at and a brief overview of seven common dermatoses seen in childhood.