Nail findings in patients with psoriatic arthritis: A cross-sectional study with special reference to transverse grooves

Patients with psoriatic arthritis (PsA) commonly present with nail manifestations; however, little is known about these manifestations.This study investigated whether nail findings can be used to discriminate between PsA and psoriasis without arthritis.We performed a retrospective analysis of 118 patients with PsA and 974 patients with psoriasis without arthritis who visited St. Luke's International Hospital (Tokyo, Japan) between July 2003 and...