title: Linear rash from shoulder to wrist.
authors.affiliation: Department of Family Medicine and Primary Health Care, United Christian Hospital and Tseung Kwan O Hospital, Kowloon East Cluster, Hospital Authority, Hong Kong, China. Email: chowkl2@ha.org.hk.
authors.forename: Kai Lim
authors.initials: KL
authors.lastname: Chow
authors.affiliation: Department of Family Medicine and Primary Health Care, United Christian Hospital and Tseung Kwan O Hospital, Kowloon East Cluster, Hospital Authority, Hong Kong, China.
authors.forename: Pang Fai
authors.initials: PF
authors.lastname: Chan
authors.affiliation: Department of Family Medicine and Primary Health Care, United Christian Hospital and Tseung Kwan O Hospital, Kowloon East Cluster, Hospital Authority, Hong Kong, China.
authors.forename: Loretta Kit Ping
authors.initials: LK
authors.lastname: Lai
authors.affiliation: Department of Family Medicine and Primary Health Care, United Christian Hospital and Tseung Kwan O Hospital, Kowloon East Cluster, Hospital Authority, Hong Kong, China.
authors.forename: David Vai Kiong
authors.initials: DV
authors.lastname: Chao
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D017512:Lichenoid Eruptions / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy; D034941:Upper Extremity / Q000473:pathology*; D057832:Watchful Waiting / Q000379:methods; D055815:Young Adult