title: Test yourself: answer psoriatic onycho-pachydermo periostitis (POPP).
authors.affiliation: Department of MSK Radiology, Leeds Teaching Hospitals, Leeds, West Yorkshire, UK, bethapudi@gmail.com.
authors.forename: Sarath
authors.initials: S
authors.lastname: Bethapudi
authors.forename: Jill
authors.initials: J
authors.lastname: Halstead
authors.forename: Zoe
authors.initials: Z
authors.lastname: Ash
authors.forename: Dennis
authors.initials: D
authors.lastname: McGonagle
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Grainger
mesh_terms: D015535:Arthritis, Psoriatic / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D005528:Foot / Q000000981:diagnostic imaging / Q000473:pathology; D005533:Foot Dermatoses / Q000175:diagnosis*; D006801:Humans; D008875:Middle Aged; D009260:Nail Diseases / Q000175:diagnosis*; D010522:Periostitis / Q000175:diagnosis*; D011859:Radiography