title: Clinics in diagnostic imaging (151). Acromioclavicular joint geyser sign with chronic full-thickness supraspinatus tendon (SST) tear.
abstract: An 82-year-old man presented with neck pain, right upper limb radiculopathy and right shoulder pain. Physical examination revealed a soft lump over the right shoulder joint, as well as reduced range of shoulder movements. On magnetic resonance imaging, the soft lump was shown to be a cystic mass over the acromioclavicular joint and was related to a full-thickness supraspinatus tendon tear. This is the classic geyser sign. The pathophysiology and clinical features of the geyser sign, and its imaging features with various imaging modalities, are discussed.
authors.affiliation: Department of Diagnostic Radiology, Singapore General Hospital, Outram Road, Singapore 169608. steven.wong@sgh.com.sg.
authors.forename: Andrew Yu Keat
authors.initials: AY
authors.lastname: Khor
authors.affiliation: Department of Diagnostic Radiology, Singapore General Hospital, Outram Road, Singapore 169608. steven.wong@sgh.com.sg.
authors.forename: Steven Bak Siew
authors.initials: SB
authors.lastname: Wong
mesh_terms: D000173:Acromioclavicular Joint / Q000000981:diagnostic imaging* / Q000293:injuries*; D000368:Aged; D000369:Aged, 80 and over; D005471:Fluoroscopy; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D016059:Range of Motion, Articular; D012782:Shoulder / Q000502:physiology; D012785:Shoulder Joint / Q000473:pathology; D013708:Tendon Injuries / Q000473:pathology*