Double‐ring sign in granulocyte colony‐stimulating factor‐induced vasculitis

Abstract

Key message If a double‐ring sign is found in contrast‐enhanced computed tomography, this should raise concern not only for Takayasu arteritis, but also for granulocyte colony‐stimulating factor‐induced vasculitis.

Keywords

• double‐ring sign
• granulocyte colony‐stimulating factor
• lung cancer
• Takayasu arteritis
• vasculitis