title: The 'ring sign' of psoriasis.
authors.forename: P
authors.initials: P
authors.lastname: Randell
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011565:Psoriasis / Q000473:pathology*