title: Picture of the month--quiz case. Halo scalp ring.
authors.affiliation: Department of Dermatology, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, USA.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Anshelevich
authors.forename: Kevin C
authors.initials: KC
authors.lastname: Osterhoudt
authors.forename: Camille E
authors.initials: CE
authors.lastname: Introcaso
authors.forename: James R
authors.initials: JR
authors.lastname: Treat
mesh_terms: D000505:Alopecia / Q000151:congenital* / Q000175:diagnosis*; D001720:Birth Injuries / Q000175:diagnosis; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D012535:Scalp / Q000098:blood supply*