A Study With TEPEZZA in Patients With Diffuse Cutaneous Systemic Sclerosis (dcSSc)

TEPEZZA is a fully human anti-IGF-1R mAb. TEPEZZA will be provided in single-dose 20 mL glass vials as a freeze-dried powder. Each vial of TEPEZZA must be reconstituted with 10 mL of water for injection. Reconstituted TEPEZZA solution must be further diluted in 0.9% (w/v) sodium chloride (NaCl) solution prior to administration. TEPEZZA will be administered in 100 mL or 250 mL infusion bags (100 mL infusion bags for doses up to 1800 mg and 250 mL infusion bags for doses \> 1800 mg).

Placebo will consist of normal saline (0.9% NaCl) solution and will be administered in 100 mL or 250 mL infusion bags, as would be appropriate, per weight-based dosing volumes (100 mL infusion bags for doses up to 1800 mg and 250 mL infusion bags for doses \> 1800 mg).