Overview Study to Investigate the Efficacy and the Safety of M518101 in Psoriasis Patients Status: Completed Trial end date: 2009-12-01 Target enrollment: Participant gender: Summary This study is to investigate the efficacy and safety of M518101 in male and female plaque psoriasis patients with refractory plaques. Phase: Phase 2 Details Lead Sponsor: Maruho Co., Ltd.