Plaquenil patients please click here for important information about your medication. ... Corticosteroid injections are injected into joints with arthritis, bursitis, tendinitis, carpal tunnel, tennis elbow, trigger fingers, ganglion cysts, and tender soft tissue points. ... Seaford, DE 19973 Tel: (302) 628-8300 Fax: (302) 628-8400. Seaford, DE ...Services‧Infusion Center‧Insurance‧Platelet Rich Plasma.