Peds
Transient Neonatal Pustular Melanosis
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Transient Neonatal Pustular Melanosis
, Pustular Melanosis, Transient Neonatal Pustulosis
See Also
Newborn Skin Exam
Definitions
Transient Neonatal Pustular Melanosis
Newborn Rash
with vessicles and
Pustule
s most common with dark complexion
Epidemiology
Incidence
by ethnicity
Black Infants: 4.4%
White Infants: 0.2%
Pathophysiology
Benign condition
Resolves spontaneously in first 3 months of life
Signs
Size: 2 to 4 mm
Initial: Milky fluid filled
Pustule
Later: Hyperpigmented
Macule
with scale (collarette appearance) after
Pustule
ruptures
No surrounding erythema (contrast with
Erythema Toxicum Neonatorum
)
Distribution
Especially on chin, neck, trunk and buttock
Can be on palms and soles
Differential Diagnosis
See
Neonatal Pustules and Vessicles
Erythema Toxicum Neonatorum
variant
Contrast with no surrounding erythema in
Melanosis
Infectious
Pustule
s (contrast with the uniquely pigmented
Macule
in
Melanosis
)
Labs
Pustule
s contain
Neutrophil
s on
Gram Stain
or wright stain
Culture Negative
Management
Reassurance for parents
References
Claudius and Behar in Herbert (2020) EM:Rap 20(8): 5-7
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