Factors Impacting Recurrence Rate After Open Ganglion Cyst Excision

A Case of Traumatic Distal End Radius Fracture With a Hemorrhagic Volar Wrist Ganglion Cyst

Wrist ganglion cysts are the most common benign soft tissue swelling in the hand and wrist. They may arise from flexor and extensor tendon sheaths, interphalangeal joints, wrist joints, and even the neural tissues around the hand and wrist. Some volar wrist ganglion cysts arise from the radiocarpal joint and scaphotrapezial joint. It is uncommonly encountered as an incidental finding during the fixation of a distal radius fracture. In our case, a volar wrist hemorrhagic ganglion cyst was incidentally found during the fixation of the fracture. Prior to the injury, the patient had no complaints of swelling over her right wrist. The cyst was removed using microscopic magnification.

Open Excision of Dorsal Wrist Ganglion

Background

Ganglion cysts are benign soft-tissue tumors that are most commonly found in the wrist. Within the wrist, 60% to 70% of ganglion cysts occur on the dorsal side and 20% to 30% occur on the volar side1. Although ganglia arise from multiple sites over the dorsal wrist, dorsal ganglia most commonly originate at the scapholunate joint2,3. Open excision is the standard surgical treatment for dorsal wrist ganglia. This procedure is considered when symptoms such as pain and range-of-motion deficits begin to impact activities of daily living.

Description

Open excision of a dorsal wrist ganglion is commonly performed with the patient under general anesthesia or a regional block. The patient is placed in the supine position, and a tourniquet is applied on the affected upper limb. After outlining the periphery of the palpable ganglion, the surgeon makes a transverse or longitudinal incision over the ganglion. The surgeon then begins a deep dissection, dissecting through the subcutaneous tissue and isolating the ganglion while avoiding any rupture, if possible. Once the cyst has been identified, extensor tendons surrounding the cyst are retracted and the cyst and stalk are mobilized. The cyst and stalk are subsequently excised, and the wound is closed4.

Alternatives

Alternative treatments for dorsal wrist ganglia include nonoperative interventions such as observation, aspiration, controlled rupture, and injection. Operative treatments include arthroscopic and open dorsal wrist ganglion resections.

Rationale

Although nonoperative treatment can produce successful outcomes, the various modalities have been associated with recurrence rates ranging from 15% to 90%4. As a result, surgical excision remains the gold standard of treatment and is typically indicated when weakness, pain, and limited range of motion interfere with activities of daily living. Among surgical interventions, arthroscopic excision is a minimally invasive procedure that has become more common because of the reduced scarring and faster recovery5. However, open excision, which does not involve complex equipment, is regarded as the standard among surgical treatments. Although the rates of recurrence for arthroscopic versus open dorsal ganglion excision are similar, arthroscopic excision is less effective with regard to pain relief5,6. This difference in pain relief could potentially be the result of the neurectomy of the posterior interosseous nerve in an open excision. In contrast, an arthroscopic procedure may provide less relief of pain from the posterior interosseous nerve stump attaching to the scarred capsule5.

Expected Outcomes

Open excision of a dorsal wrist ganglion is a safe, reliable procedure. The recurrence rate after open excision is similar to that after arthroscopic excision and significantly lower recurrence than that after ganglion cyst aspiration6,7. Additionally, not all ganglion cysts can be aspirated. In a retrospective study assessing the risk of recurrence after open excision of ganglion cysts in 628 patients, researchers reported a recurrence rate of 4.1% among the 341 who underwent open dorsal ganglion excision. Furthermore, the authors reported male sex and less surgeon experience as significant risk factors for cyst recurrence8. In a study assessing outcomes of open dorsal ganglion excision in 125 active-duty military personnel, researchers reported a recurrence rate of 9%. More notably, the researchers found persistent pain at 4 weeks postoperatively in 14% of the participants. The authors recommended that patients whose daily activities require forceful wrist extension, such as athletes and military personnel, should be counseled on the potential functional limitations and residual pain from open dorsal wrist ganglion excision9.

Important Tips

When conducting an open excision, it is beneficial to identify the stalk of the cyst, allowing the surgeon to excise the complete ganglion complex and prevent recurrence.For large cysts that adhere to the surrounding soft tissue, it is helpful to rupture the ganglion in order to facilitate an easier deep dissection.Excising the scapholunate interosseous ligament could possibly lead to scapholunate dissociation and instability.The posterior interosseous nerve courses past the 4th dorsal compartment and may be resected during the deep dissection.

Factors associated with self-reported pain and hand function following dorsal wrist ganglion excision

This study aimed to analyse which factors contribute to pain and limited hand function after dorsal wrist ganglion excision. We included 308 patients who underwent surgery between September 2017 and August 2021. Patients completed baseline questionnaires and the patient-rated wrist/hand evaluation questionnaire at baseline and 3 months postoperatively. We observed an improvement in postoperative pain and hand function, but individual outcomes were highly variable. We performed stepwise linear regression analyses to examine which patient characteristics, disease characteristics and psychological factors were associated with postoperative pain and hand function. Higher postoperative pain intensity was associated with recurrence following previous surgery, treatment of the dominant hand, higher baseline pain intensity, lower credibility the patient attributes to the treatment and longer symptom duration. Worse hand function was associated with recurrence following prior surgery, worse baseline hand function and lower treatment credibility. Clinicians should take these findings into account during patient counselling and expectation management.Level of evidence: II.

Two-Year Clinical Outcomes after Arthroscopic Re-Excision of Recurrent Dorsal Wrist Ganglion Cyst

OBJECTIVES

Arthroscopic excision of dorsal wrist ganglion (DWG) cysts has recently become an alternative to open surgery, with the advantage of lower recurrence. However, in recurrent cases, whether re-excision using an arthroscopic approach would achieve favorable outcomes has not been determined. This study aimed to evaluate the clinical outcomes of function evaluation and recurrence rate after arthroscopic excision of recurrent DWG cysts.

METHODS

A total of 11 consecutive patients with clinically diagnosed recurrent DWG cysts were retrospectively reviewed between November 2017 and March 2020. Extensive re-excision of the ganglion cyst and its surrounding pathological capsule was performed using an arthroscopic approach. Magnetic resonance imaging (MRI) was routinely performed before surgery to identify the location and limits of the cyst. All patients were followed up for a minimum of 2 years. A second recurrence was recorded if a mass reappeared at the same site with a positive transillumination test. Pain during activity was evaluated using the visual analog scale (VAS). The active range of motion (ROM) of the wrist was measured using a goniometer, and the hand grip strength was measured using a digital dynamometer. Comparative analysis between the pre- and postoperative indexes was performed using Student's t-test.

RESULTS

After a mean follow-up period of 29.3 months (range, 24-34 months), no second recurrence of the cyst was recorded. The VAS score improved from 1.4 to 0.3 (t = 3.833, p = 0.003), and residual pain was reported by three patients (VAS score = 1 for each). Active wrist flexion increased from 73.6° to 78.2° (t = 2.887, p = 0.016). No significant changes were found in active wrist extension or hand grip strength (p > 0.05). No major complications occurred during the study.

CONCLUSION

Arthroscopic excision of a recurrent DWG cyst yielded satisfactory results with no second recurrence, significant pain relief, and good wrist function at a minimum of 2-year follow-up. Clear identification of the location and limits of the ganglion based on preoperative MRI could be helpful to achieve complete excision and therefore prevent a second recurrence.