Ted Rosen, MD

The morphology and distribution of these lesions is characteristic of ectoparasite bites, which occur when a human carries a pet-usually a kitten or puppy-as if the animal were a human newborn baby.

The black, hard center represents an eschar. This type of morphology is almost always caused by a virulent organism-bacterial or fungal. Biopsy showed non-septate hyphae within the dermis, and a culture grew Mucor species (a saprophytic soil fungus).

Not all patients with life-threatening dermatologic disorders are sick enough or symptomatic enough to go to the emergency department. . . some may come to your office with what may look like a relatively benign lump or bump. Yet within a few hours, such lesions can cause significant morbidity or even death.

The multiple erosions on this teenager's lip are most likely an exaggerated version of herpes labialis related to his underlying lymphoma. A viral culture would be useful to verify the diagnosis.

The “rash” of innumerable asymptomatic flat-topped papules on this teenager’s face is highly likely to be flat warts.

Molluscum contagiosum: they’re embarrassing and contagious-- and treatable. Details for a successful outcome here.

This distribution of an inflammatory disorder in a very young child almost always indicates atopic dermatitis. The family history of asthma suggests the atopic diathesis.

The history and lesional morphology are virtually pathognomonic for a dental sinus. Radiographic examination revealed an apical dental abscess that communicated with the skin via a sinus tract.

Erythema and periumbilical swelling led to concern about bacterial infection in a neonate.

This lump on the back of a neonate was noted shortly after birth and had been expanding. What is it?

This rash arose a week after a 6-year-old boy complained of chills, nausea, and sore throat. WHat's the cause?

Poison ivy, oak, or sumac? What is this "itchy rash" that appeared 2 days after the patient cleared some "weeds" from the yard. What should be done about it?

Any itchy penile rash should immediately suggest scabies. The latter also typically involves the hands, especially the interdigital webspaces and the volar aspect of the wrist.

A pigmented lesion present since birth prompted the parents of this 3-year-old to seek medical care. They noted recent changes: the development of “bumps” in a formerly “flat” lesion.

Gradual alterations in all 20 nails prompted this teenager to seek care. He had no associated symptoms. He had not experienced hair loss, nor any other cutaneous or scalp lesions.

A 9-year-old girl is brought by her mother because of the acute onset of a facial rash. There is no associated itching, and the child is, and has been, otherwise healthy.

Here: Ted Rosen, MD, presents 2 tips about 2 skin disorders that you might not know.

Here: Ted Rosen, MD, presents 5 tips about 5 skin disorders that you might not know.

Match the following clinical characteristics with the photographs of Cases 1 and 2. Then read the brief descriptions that follow on pages 314 and 315 to see how well you did.