Fig. 1From: Arthroscopic synovectomy versus intra-articular injection of corticosteroids for the management of refractory psoriatic or rheumatoid arthritis of the wrist: study protocol for a randomized controlled trial (ARCTIC trial)Wrist arthroscopy portals. Abbreviations: 3–4 portal between the third and fourth extensor tendon compartments, 6R portal radial of the sixth extensor tendon compartment, MC-R midcarpal radial portal, MC-U midcarpal ulnar portalBack to article page