Ganglion Cyst
A ganglion cyst is the most common soft tissue mass of the hand and wrist. These benign, fluid-filled lumps arise from joint capsules or tendon sheaths and most often appear on the back of the wrist, though they can occur in several other locations. Many ganglion cysts cause no symptoms and require no treatment, while others produce pain, weakness, or unsightly swelling that warrants intervention. At Maryland Orthopedic Specialists, our hand surgeons offer accurate diagnosis, honest guidance on observation, and all treatment options from aspiration to surgical excision.
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What is ganglion cyst?
A ganglion cyst is a mucin-filled cystic outpouching that communicates with a nearby joint or tendon sheath through a one-way valve-like pedicle. The cyst wall is composed of compressed collagen fibers and fibrous tissue (not a true synovial lining), and its contents are a thick, gelatinous fluid rich in glucosamine, hyaluronic acid, and albumin.
A ganglion cyst is a mucin-filled cystic outpouching that communicates with a nearby joint or tendon sheath through a one-way valve-like pedicle. The cyst wall is composed of compressed collagen fibers and fibrous tissue (not a true synovial lining), and its contents are a thick, gelatinous fluid rich in glucosamine, hyaluronic acid, and albumin.
Types and Locations
Dorsal Wrist Ganglion (approximately 60–70% of all wrist/hand ganglia): The most common variety, arising from the dorsal aspect of the scapholunate interosseous ligament (SLIL) at the dorsal wrist capsule. The cyst is typically visible as a smooth, firm, non-tender (or mildly tender) lump at the back of the wrist near the base of the index/middle finger. Importantly, a dorsal wrist ganglion is intimately associated with the scapholunate ligament — occult ganglia overlying a partially torn SLIL are a recognized clinical entity, and persistent wrist pain after cyst excision may reflect an underlying ligament injury.
Volar Wrist Ganglion (approximately 20%): Arises from the radiocarpal or scaphotrapeziotrapezoid (STT) joint, typically presenting as a soft mass on the volar-radial aspect of the wrist between the flexor carpi radialis tendon and the radial artery. Surgical excision requires careful protection of the radial artery and adjacent median nerve branches.
Volar Retinacular (Seed) Ganglion (approximately 10%): A small, firm nodule arising from the flexor tendon sheath at the level of the A1 or A2 pulley, in the proximal palm or at the base of the finger. These cysts are often tender with grip and can be confused with a trigger finger nodule. They are characteristically hard (like a pebble) because of their small size and dense contents.
Intraosseous Ganglion: Occurs within the carpus (most commonly the lunate or scaphoid) and is visible only on MRI or CT. May be associated with avascular necrosis or carpal arthritis.
Mucous Cyst (DIP Joint Ganglion): A distinct subtype arising from the DIP joint associated with osteoarthritis — covered separately on the Mucous Cyst page.
Why Do Ganglia Form?
The exact mechanism is debated. The leading theory is that repetitive microtrauma or joint synovial herniation causes focal degeneration of the joint capsule with subsequent mucin accumulation. Ganglia are more common in young women (2–3:1 female predominance), patients with joint hypermobility, and those with underlying carpal ligament pathology.
Treatment options
Observation
Many ganglion cysts resolve on their own and can be safely watched if they are not causing pain or limiting function. No treatment is needed unless the cyst grows or starts to bother you.
Aspiration
Draining the cyst with a needle is a quick, office-based option that relieves symptoms right away. Cysts frequently return after aspiration because the connection between the cyst and the joint remains intact.
Ganglion Cyst Excision
Surgical removal of a ganglion cyst arising from the wrist joint or tendon sheath. Performed open or arthroscopically — arthroscopic excision of dorsal wrist ganglia carries a lower recurrence rate than aspiration alone.
Click for more Surgical ProcedureWrist Arthroscopy
Diagnostic and operative arthroscopic evaluation of the wrist joint to assess and treat TFCC tears, scapholunate ligament injuries, synovitis, and loose bodies with minimal disruption to surrounding structures.
Click for moreFrequently Asked Questions
Is a ganglion cyst dangerous?
Why does my cyst come and go?
If I have a ganglion on the back of my wrist, could my wrist ligament be torn?
Will the cyst come back after surgery?
Can I have a ganglion aspirated multiple times?
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References
- Thornburg LE. Ganglions of the hand and wrist. Journal of the American Academy of Orthopaedic Surgeons. 1999;7(4):231–238. doi:10.5435/00124635-199907000-00003
- Dias J, Buch K. Palmar wrist ganglion: does intervention improve outcome? A prospective study of the natural history and patient-reported treatment outcomes. Journal of Hand Surgery (British Volume). 2003;28(2):172–176. doi:10.1016/S0266-7681(02)00221-X
- Rizzo M, Berger RA, Steinmann SP, Bishop AT. Arthroscopic resection in the management of dorsal wrist ganglions: results with a minimum 2-year follow-up period. Journal of Hand Surgery (American Volume). 2004;29(1):59–62. doi:10.1016/j.jhsa.2003.10.015
- Slesarenko YA, Hurst LC, Sampson SP. Outcome of arthroscopic treatment of dorsal wrist ganglia. Hand (New York). 2006;1(2):63–65. doi:10.1007/s11552-006-9003-3
- Dias J, Webber NP, Scott TD. Dorsal wrist ganglia. In: Wolfe SW, et al. Green's Operative Hand Surgery, 7th ed. Philadelphia: Elsevier; 2017.