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Persistent congenital pigmented plaque

You are called to the newborn nursery to evaluate a healthy vigorous newborn with a large dark brown area on the back of the scalp and neck. The anxious first-time parents are tapping on the nursery window as you examine the child. What's the diagnosis
fig. 1

Progressive papulopustular periorificial process

An unhappy mother tells you that she is not leaving the office until you make her daughter’s face normal again. The healthy 11-year-old girl has had an asymptomatic slowly progressive eruption which started around her mouth 3 years ago and spread around her nose and eyes over the last year. What’s your diagnosis?

Covered with ringworm?

You are asked to evaluate a toddler who has been covered with ringed plaques for 2 months. His exasperated mother has watched the eruption progress despite treatment with topical antifungal creams. The asymptomatic lesions are generalized but most prominent on the extensor surfaces of his arms and flexural surfaces of his legs. What's the diagnosis?

Annoying neck nodules in an adolescent boy

A healthy adolescent boy asks you to cure an itchy rash on the nape of his neck, which started over a year ago when he switched barbers. (fig. 1).