title: A case of congenital solitary Langerhans cell histiocytoma.
abstract: A newborn baby boy was referred to the Paediatric Dermatology Unit with a solitary asymptomatic nodule overlying his right nasolabial fold. Complete physical examination, full blood count, serum chemistry, liver function tests and baseline imaging were unremarkable. Histopathological examination showed an atypical dermal infiltrate of mononuclear cells that stained positive with CD1a and S100. A diagnosis of congenital solitary Langerhans cell histiocytoma was made. The lesion completely resolved by 4 months of age. The baby is now 15 months old and repeat systemic evaluation has remained normal.
authors: Department of Dermatology, Our Lady of Lourdes Hospital, Drogheda, Dublin, Ireland. berniricciardo@yahoo.com.au
authors: Bernadette
authors: B
authors: Ricciardo
authors: Alan
authors: A
authors: Irvine
authors: Michael
authors: M
authors: McDermott
authors: John
authors: J
authors: Ryan
authors: Sinead
authors: S
authors: Collins