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Related Experiment Video

Updated: Feb 6, 2026

Arthroscopic Management of Massive Irreparable Rotator Cuff Tears: Whole Rotator Cable Reconstruction Using Proximal Biceps Tendon Autograft
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MR Geyser Sign in chronic rotator cuff tears.

R S Negi1, B Gogoi2, A S Randhawa3

  • 1Senior Advisor (Radiology), 151 Base Hospital, C/O 99 APO, India.

Medical Journal, Armed Forces India
|August 11, 2018
PubMed
Summary

Acromio-clavicular (AC) joint cysts, often linked to rotator cuff tears, can present as a "Geyser Sign." This case highlights a large type 2 AC joint cyst associated with a chronic rotator cuff tear, visualized via MRI.

Keywords:
AC joint cystsChronic rotator cuff tearGeyser Sign

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Area of Science:

  • Orthopedics
  • Radiology
  • Musculoskeletal Imaging

Background:

  • Acromio-clavicular (AC) joint cysts are uncommon manifestations of chronic shoulder conditions.
  • Type 1 AC joint cysts arise from AC joint degeneration with an intact rotator cuff.
  • Type 2 AC joint cysts are associated with chronic rotator cuff tears, a phenomenon known as the Geyser Sign.

Purpose of the Study:

  • To present a case of a large type 2 AC joint cyst.
  • To illustrate the Geyser Sign in the context of a chronic rotator cuff tear.
  • To emphasize the utility of MRI in diagnosing this condition.

Main Methods:

  • Case report presentation.
  • Magnetic Resonance Imaging (MRI) utilized for diagnosis.
  • Review of literature on AC joint cysts and Geyser Sign.

Main Results:

  • A large type 2 AC joint cyst was identified.
  • The Geyser Sign was clearly visualized on MRI.
  • The cyst was secondary to a chronic rotator cuff tear.

Conclusions:

  • The Geyser Sign is a key indicator of rotator cuff pathology in AC joint cysts.
  • MRI is an effective modality for diagnosing type 2 AC joint cysts and associated rotator cuff tears.
  • This case underscores the importance of recognizing the Geyser Sign for accurate diagnosis and management of shoulder pathology.