Prevalence of Birthmarks and Transient Skin Lesions in 1000 Spanish Newborns

Epidemiology and Predisposing Factors for Erythema Toxicum Neonatorum and Transient Neonatal Pustular: A Multicenter Study

“…The prevalence of ETN in the study population was higher than in previous reports for Iranian (11.1% in the first 48 hours of life) and Spanish (16.6% in the first 72 hours of life) newborns but similar to that observed in a pooled sample of 10 trials, in which the overall prevalence of ETN was 22% . Some authors have reported that ETN occurs mainly between 24 and 72 hours of life ; in this study, the greatest frequency of ETN was observed between 24 and 48 hours of life.…”

Adnexal polyp of neonatal skin: a forgotten diagnosis

“…Adnexal polyp of neonatal skin is an unusual entity that was first described by Hidano and Kobayashi in 1975 . Its incidence is variable: in Japan it is about 4% but in Spain it is extremely rare …”

“…3 Its incidence is variable: in Japan it is about 4% 1 but in Spain it is extremely rare. 2 It consists of an asymptomatic benign congenital tumor, of few millimeters in diameter. It is usually a solitary lesion located around the nipple which becomes dry and dark, and falls off spontaneously a few days after birth without scarring.…”

“…Birthmarks and transient skin lesions are present in almost all neonates and are well known by pediatricians and dermatologists. Some of them are very prevalent such as erythema toxicum neonatorum, Epstein pearls, or salmon patch . However, there are other uncommon conditions reported less frequently.…”

“…Some of them are very prevalent such as erythema toxicum neonatorum, Epstein pearls, or salmon patch. 1,2 However, there are other uncommon conditions reported less frequently. This is the case of adnexal polyp of neonatal skin, which appears at birth and usually falls off spontaneously within a few days.…”