Dermatology

Fewer than two-thirds of men know the signs of skin cancer and the younger they are the less likely they are to believe they are at risk for the disease, according to a national survey.

Tinea versicolor presents with hyperpigmented and hypopigmented coalescing thin scaly plaques and macules.Typically they appear on the trunk and the upper back. It is more common in warm humid climates.

These asymptomatic plaques developed on the legs of a 59-year-old woman with diabetes mellitus and pulmonary sarcoidosis. Biopsy showed a granulomatous infiltrate of epithelioid histiocytes and multinucleated giant cells surrounded by lymphocytes “layered” throughout the dermis. What’s your diagnosis?

Is this lesion a skin cancer? Does organophosphate poisoning cause syncope? How is tinea pedia complex best treated? Try your hand at this week’s quiz questions.

This man had been taking vancomycin and piperacillin/tazobactam for 3 weeks for osteomyelitis. What does the rash look like to you?

The rash has been present for 2 years. Originally on the trunk and extremities it has now spread to her face and hands. She has been diagnosed as having and been unsuccessfully treated for nummular eczema and tinea corporis. What's your Dx?

Lichen spinulosus is a rare, hyperkeratotic dermatosis similar to keratosis pilaris. It is most common in children, adolescents, young adults with male predominance. Treatment includes keratolytics and emollients.

The asymptomatic atrophic brown plaques on this woman’s legs were diagnosed as necrobiosis lipoidica. The differential diagnosis included lupus erythematosus and granuloma annulare.

Polymorphic light eruption, phototoxicity, solar purpura, basal cell carcinoma, squamous cell carcinoma, keratoacanthoma, venous lakes, photosensitivity-a look at the many adverse effects of too much sun exposure.

A 6-year-old boy had a 1-month history of an intensely pruritic “rash” on the left dorsal foot and left lower leg. He had a recent history of walking barefoot on a beach in south Florida where dogs are allowed. What's your diagnosis?

This week’s quiz questions challenge you to determine the cause of an infant’s “strange breathing” based on a chest film, to come up with the most common cause of chronic cough in children, to be a dermatologic detective, among other things.

A 4-year-old, previously healthy girl presented with large, tense bullae involving up to 40% of her body surface area. Her parents described a 12-day history of itchy, papulovesicular lesions that had progressed into large blisters. Your dx?

A toddler from Nigeria, whose parents remained there ill with AIDS, presented with a fever and a widespread itchy eruption. Tests for HIV infection were positive. Which systemic etiologies can be ruled out when such an eruption presents?

Erythema migrans, the characteristic rash of Lyme disease, often has a bull’s-eye appearance. Which of the following additional factors can help the diagnosis?

Meet patients’ facial skin problems head-on by gaining a familiarity with the common problems and symptoms. This week’s photo quiz offers a variety of presentations to test your prima facie knowledge.

A 60-year-old Caucasian man with a history of invasive squamous cell carcinoma of the lung presents with the lesions shown. Metastases to the skin can be a clinical finding in many malignancies.

This patient with type 1 diabetes noted a painful erosion at the site of tattoo she had gotten several days earlier. What's the most likely cause?

Lyme disease and other tick-borne illnesses occur most often in the late spring and summer months, many with similar presentations, making this a good time to test your knowledge of these pesty posers.

This firm exquisitely tender mass developed after the 77-year-old woman fell a few days earlier. She had a history of an embolic cerebral stroke, for which she takes warfarin. Your Dx?

Many skin disorders look alike, and psoriasis can be especially tough to diagnose. Take this photo quiz to test your knowledge of these similar syndromes.

Diagnosing and managing infectious diseases can be challenging. This week’s photo quiz offers a variety of presentations to test your acumen.

This chronic, autoimmune, subepidermal disease mostly affects older persons. Marked by spontaneous remissions and exacerbations, it manifests with tense blisters that usually start on the arms and legs. Your dx?

A 9-year-old boy presented with a 1-week history of pruritus and rash on his elbows, knees, back, and legs. He had recently run through a field of tall grass but denied any other exposure history. Your Dx?

Many medical problems are common to both men and women, but several occur more frequently in women. This week’s photo quiz tests your knowledge of a variety of these disorders.

This 66-year-old black woman presented with a 2-year history of a painless skin eruption. She stated that her skin had “changed overnight” while she was caring for her mother who had been hospitalized. Your diagnosis?