An Open-Label Single-Arm Clinical Trial to Evaluate The Efficacy of Abatacept in Moderate to Severe Patch Type Alopecia Areata

"After the screening period, subjects will begin weekly self-administered subcutaneous abatacept and will continue treatment for 6 months. Patients will be instructed in self-administration of study medication at baseline (week zero) and will be observed self-administering medication at each visit. Instructions regarding study drug administration will be reinforced as needed.~The 6-month treatment period is expected to provide adequate time to assess the short-term efficacy and safety of abatacept in patients with moderate to severe AAP. Responders will then be followed for 6 months off drug."