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.
Ted Rosen, MD
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.
Molluscum contagiosum: they’re embarrassing and contagious-- and treatable. Details for a successful outcome here.
The “rash” of innumerable asymptomatic flat-topped papules on this teenager’s face is highly likely to be flat warts.
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 rash arose a week after a 6-year-old boy complained of chills, nausea, and sore throat. WHat's the cause?