Newborn with blisters, pustules, erosions, and ulcerations

Question 1

Tzanck smear looks for what

Answer 1

Multinucleated giant cells in herpes

Eosinophils and neutrophils in noninfectious pustular eruptions

Question 2

Erythema toxicum neonatorum

Answer 2

Not present at birth
Usually in full term delivery between 24-48hrs
Begins on face with involvement of trunk and proximal extremities
Spares palms and soles
Wright stain shows numerous eosinophils

Question 3

Transient neonatal pustular Melanosis

Answer 3

Present at birth
More common in black infants
Vesicopustules with no erythema rupture firming hyper pigmented macula with collarette of scale 
Can involve hands and feet
Often see on face
Wright stain shows PMNs and eos

Question 4

Neonatal acne

Answer 4

1-2 weeks after birth

Same distribution as adolescent acne

Question 5

Miliaria

Answer 5

Usually 1 week after birth
Caused by occlusion of eccrine sweat glands
Crystallina form: occlusion at stratum corneum
Rubra: occlusion intraepidermally
Self-limited process