title: The red scalp sign.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Marinella
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D004890:Erythema / Q000175:diagnosis*; D006801:Humans; D008297:Male; D011087:Polycythemia Vera / Q000175:diagnosis* / Q000601:surgery; D012535:Scalp