: Sebaceous glands are very sensitive to androgens which can modify the size but not the number of sebaceous glands. Sebaceous hyperplasia is a common benign proliferation of the sebaceous glands seen during the first weeks of life, being reported in 89.4% of 1000 newborns enrolled in across-sectional prospective study in the period of November 2007 to May 2009 in India  or in 35% of 2938 neonates aged up to three days of life hospitalized in a Brazilian city . Sebum secretion is high in neonates probably induced by maternal androgen: dehydroepiandrosterone transferred trans-placental.  It is also named the miniature puberty of the newborn along with vaginal bleeding in infant girls and neonatal acne. Reduced androgen levels in elderly could explain hyperplasia of sebaceous glands (slower cell turnover), especially in women while high androgen-dependent sebum secretion in neonates results in neonatal sebaceous hyperplasia. The association between sebaceous hyperplasia and androgens has been demonstrated in animal models , but no correlation was found between serum androgen levels and the appearance of sebaceous hyperplasia lesions in women .Controversial data exist and further clinical studies are required.
|Neonatal sebaceous gland hyperplasia||Adult sebaceous gland hyperplasia|
|Age of onset||First weeks of life||Middle age-elderly persons|
|Sites of skin lesions||nose||forehead,genitalia, areola, chest|
|Androgen levels||high||low/normal (hyper-receptivity)|
|Evolution||Spontaneously remission within weeks||progressive evolution without treatment|
20 - 23 May 2017
European Society of Endocrinology