Overview Effect Observation Study of COX-2 Inhibitor to Treat Primary Hypertrophic Osteoarthropathy Status: Unknown status Trial end date: 2016-07-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine whether COX-2 inhibitor is effective in the treatment of primary hypertrophic osteoarthropathy Phase: Phase 3 Details Lead Sponsor: Peking Union Medical College HospitalTreatments: Cyclooxygenase 2 InhibitorsEtoricoxib