A 44-year-old right-hand-dominant woman presented shoulder pain and dysfunction for 20 weeks. Pain started insidiously in the cervical spine 1 year previously and progressed to the right shoulder. Pain and stiffness were aggravated by all movements of the shoulder, but were most severe at rest. The intensity of pain and stiffness increased over time, and she complained of not being able to move her left arm and having difficulties in dressing and washing herself. At physical examination, both active and passive ranges of motion were severely restricted. She had no history of acute trauma, dislocation, previous shoulder surgery, or arthritis. No abnormalities were found at cervical MRI 2 months before. Previous physical therapy and antiinflammatory medication failed to improve her symptoms. We performed shoulder MR arthrography.