Introduction
Ganglion cysts and mucoid cysts are common, benign lumps that develop around joints or tendons. While not cancerous, they can sometimes cause pain, stiffness, or cosmetic concern.
- Ganglion cysts most often appear on the wrist or hand.
- Mucoid cysts are typically found near the end joints of the fingers.
Understanding these cysts can help patients make informed decisions about whether treatment is necessary.
What Is a Ganglion Cyst?
- A fluid-filled sac that develops near joints or tendons.
- Filled with a gel-like fluid similar to joint (synovial) fluid.
- Most commonly occurs on the back of the wrist, but can also appear on the palm side of the wrist, hand, foot, or ankle.
Symptoms may include:
- A visible or palpable lump that can change size
- Discomfort or pain with joint use
- Restriction in movement if the cyst is large
- Cosmetic concern, especially on the hand
What Is a Mucoid Cyst?
- A type of digital mucous cyst found near the terminal fingertip joint (distal inter-phalangeal joint).
- Commonly associated with osteoarthritis and bony spurs within the joint.
- Usually appears as a small, clear or flesh-coloured bump near the base of the fingernail.
Symptoms may include:
- A small, firm lump on the finger joint
- Nail deformity if the cyst presses on the nail bed
- Occasional tenderness
Causes and Risk Factors
Both types of cysts are caused by synovial fluid leaking into surrounding tissues with an ‘one-way valve’ from joint capsule or tendon sheath as result of trauma / tear:
- Ganglion cysts: Often linked to joint irritation, repetitive movements, or trauma – arise from wrist joint capsule or tendon sheath
- Mucoid cysts: Frequently associated with degenerative joint changes (arthritis) of the small finger joints
Diagnosis
Most cysts can be diagnosed based on examination, with its characteristic features. Occasionally, additional tests may be needed:
- Imaging such as Ultrasound or MRI to confirm the diagnosis, and for surgical planning (if the mass is large)
- X-rays if arthritis is suspected (especially for mucoid cysts)
Treatment Options
- Observation (Watch and Wait)
- If the cyst is painless and not causing functional issues, no treatment is required.
- Some cysts may shrink or disappear on their own.
- Non-Surgical Treatments
- Splinting to rest the affected joint
- Aspiration (draining fluid with a needle) — may provide temporary relief but cysts almost always recur – not usually recommended by specialist
- Surgical Removal – can be performed under LA in rooms or sedation / anaesthesia in private hospital as a day case
- Recommended for cysts causing pain, recurrence, or functional limitations
- Surgery involves removing the cyst and its stalk at the joint capsule or tendon sheath to reduce recurrence
- For digital mucoid cysts, surgery may also involve removing associated bone spurs (i.e. arthritis around the small joint) to prevent recurrence
- A local skin flap might be required to resurface the distal joint surface after the cyst removal, to allow satisfactory wound healing, etc
Recovery After Surgery
- Dressings/splinting: Applied for 1–2 weeks
- Return to daily use: Usually within 2–4 weeks (hand physiotherapy may help recovery)
- Recurrence risk: Lower with surgery, but not zero
When to Seek Specialist Assessment
Patients should seek plastic surgery or orthopaedic hand surgery specialist review if:
- The cyst is painful or restricting movement
- There is numbness, tingling, or nerve pressure
- It causes a visible nail deformity (mucoid cysts)
- There is uncertainty about the diagnosis
About Dr Paul Cheng
I’m Dr Paul Cheng, FRACS, a Specialist Plastic, Aesthetic & Reconstructive Surgeon with expertise in soft-tissue hand surgery. I treat common conditions such as ganglion and mucoid cysts, ensuring safe and effective care tailored to each patient.
If you have a hand or finger cyst that is painful, recurrent, or affecting function, please book a consultation to discuss the best management options.