Sacroiliitis and Spondylitis with Sternoclavicular Hyperostosis: SAPHO or an Ankylosing Spondylitis Variant?

A 62‐year‐old Chinese female patient was evaluated for her bilaterally swelling sternoclavicular joints in our center. She had a 30‐year history of nonprogressive lower back pain and spinal stiffness without debilitating motion limitation of the spine and was once diagnosed of AS in our center according to the documented human leukocyte antigen B27 (HLA‐B27) positivity. Ten years ago, she began to develop episodic pain in her sternoclavicular area and bilateral shoulders. Localized reddening and tenderness were noticed over her sternoclavicular joints and the medial clavicular areas during those episodes. Her pain could also be mitigated by oral meloxicam, and her daily activity was not affected.