U nang bao gân cơ gập Thông tin In-depth

This is the clinical evidence summary written for health professionals. It is technical, and it lists the research this page was built from. You do not need to read it to understand your treatment or to make a decision about it.

Overview

• Surgical excision is a simple, safe, and effective method for treating a painful ganglion of the digital flexor tendon sheath [1].
• Percutaneous puncture is a practical option for managing flexor tendon sheath ganglions given its low cost, lack of downtime, and low recurrence rate [2].
• No recurrences were observed after a second puncture in the cohort assessed for percutaneous puncture of flexor sheath ganglions [2].
• Endoscopic ganglionectomy via flexor carpi radialis tendoscopy is a minimally invasive approach that offers better cosmesis, less soft tissue trauma, and the ability to manage concomitant FCR tendon pathology [3].
• Endoscopic ganglionectomy via flexor carpi radialis tendoscopy carries risks of recurrence and nerve or vessel injury [3].
• Pediatric ganglions are more commonly found on the volar surface of the hand and wrist compared to adults [4].
• Pediatric ganglions more commonly have tendon sheath origin compared to adults [4].
• There is no consensus within the literature regarding the best management of pediatric wrist ganglia [9].
• No single treatment modality confers a particular advantage or disadvantage over another for pediatric wrist ganglia [9].
• Current best evidence suggests that about 40% of lesions decrease over the first 6 years after evaluation by a hand surgeon [18].
• Current best evidence suggests that most ganglions recur after aspiration [18].
• Current best evidence suggests that surgical intervention has about a 10% recurrence rate [18].
• Surgical intervention for ganglions leaves scars and has some risk for adverse events [18].
• Operation-related complications after arthroscopic volar wrist ganglionectomy are associated with anatomical location distal to the bifurcation of the radial artery and concurrently penetrated up to the superficial fascia layer [21].

Anatomy & Pathophysiology

Anatomical Location and Origin

• Volar wrist ganglia tend to arise in the interval between the first extensor compartment and the flexor carpi radialis (FCR) tendon sheath, just proximal to the wrist flexion crease [7].
• Approximately two thirds of anterior wrist ganglions reportedly arise from the radiocarpal joint [7].
• One third of anterior wrist ganglions reportedly arise from the scaphotrapezial joint [7].
• Ganglion cysts that arise from the FCR sheath are often located slightly more medially, either just radial or palmar to the sheath [7].
• Ganglions arising from the FCR sheath are typically less mobile than ganglions arising from the wrist joint [7].
• Ganglions arising from the first extensor compartment tend to adhere to the sheath (extensor retinaculum) and are less mobile [7].
• Ganglions are defined as cystic swellings closely connected to joints or tendon sheaths which contain mucinous material [64].

Clinical Presentation and Physical Characteristics

• Volar wrist ganglia typically appear to be 1 to 2 cm in size but may be significantly larger at the time of surgical dissection [7].
• Patients with volar wrist ganglions often present with a mass that has been present for a number of months or years and is typically asymptomatic [7].
• Patients with volar wrist ganglions often note discomfort when the mass is "bumped" [7].
• Clinically, volar wrist ganglia are compressible, slightly mobile, nontender, and visible when transilluminated [7].
• Volar wrist ganglia are nonpulsatile but are often intimate with the radial artery, which is palpable alongside the lesion [7].
• Most patients with intraneural ganglions are aged 30 to 50 years, though occurrence in children has also been reported [11].
• Most patients with intraneural ganglions present with a painless mass [11].
• Some patients with intraneural ganglions present with symptoms of nerve irritation or entrapment neuropathy [11].

Pathogenesis and Etiology

• The etiology of ganglions is unknown [64].
• Many hypotheses have been advanced for the pathogenesis of ganglions, including retention cyst, herniation of tendon or capsular synovia, bursal transformation, neoplasia, and mucinous degeneration of fibrous tissue [64].
• Carp and Stout reported that a ganglion does not initially connect with the joint and that communication occurs secondary to degeneration of the capsule which then ruptures [64].
• Injections of contrast material into ganglions usually fail to show a communication into the joint [64].
• Injections of contrast material into the wrists of patients have demonstrated communications into the ganglions [64].
• In forty of fifty-nine patients with ganglions in the study by Andrén and Eiken, contrast medium passed from the joint into the ganglion through a tortuous narrowed duct [64].
• The articular (synovial) theory has gained worldwide acceptance as a scientifically proven explanation for the formation of intraneural ganglions [11].
• The pathogenesis of intraneural ganglion cysts remains unclear, though trauma has been proposed as a possible reason [77].
• The theory of articular unification is mainly accepted as the cause for intraneural ganglion cysts [77].

Nerve Involvement

• Involvement of the peripheral nerves of the upper extremity by intraneural ganglion is rare [11].
• The ulnar nerve is the most commonly involved nerve in the upper extremity by intraneural ganglion [11].
• Almost any other nerve in the vicinity of a joint can be involved by intraneural ganglion [11].
• Intraneural ganglion cysts are benign, mucinous, non-neoplastic lesions of the peripheral nerves [77].

Classification

• Volar wrist ganglia tend to arise in the interval between the first extensor compartment and flexor carpi radialis (FCR) tendon sheath, just proximal to the wrist flexion crease [7].
• Ganglion cysts that arise from the FCR sheath are often in a slightly more medial location, either just radial or palmar to the sheath [7].
• Ganglions arising from the first extensor compartment tend to adhere to the sheath (extensor retinaculum) [7].
• Ganglions arising from the first extensor compartment tend to be quite firm and are less mobile [7].
• The proposed classification of ganglia helps minimize the area of resection required [50].

Clinical Presentation

General Characteristics

• Volar wrist ganglia are typically asymptomatic masses that have been present for months or years [7].
• Patients with volar wrist ganglions often report discomfort when the mass is bumped [7].
• Clinically, volar wrist ganglions are compressible, slightly mobile, nontender, and visible when transilluminated [7].
• Volar wrist ganglions are nonpulsatile but are often intimate with the radial artery, which is palpable alongside the lesion [7].
• Ganglion cysts arising from the flexor carpi radialis (FCR) sheath are often located slightly more medially, either just radial or palmar to the sheath [7].
• Ganglions arising from the first extensor compartment tend to adhere to the sheath, are quite firm, and are less mobile [7].

Epidemiology and Demographics

• Women are significantly more likely to be diagnosed with a volar wrist ganglion, regardless of age or military status [6].
• Pediatric ganglions more commonly have a tendon sheath origin compared to adults [4].
• In children aged less than 10 years, ganglion cysts present on the volar aspect of the wrist [15].
• In patients aged greater than 10 years, ganglions resemble those in the adult population and present on the dorsal aspect of the wrist [15].
• Ganglions in pediatric populations demonstrate a female predilection [26].

Imaging and Diagnosis

• Routine wrist radiography is not cost-effective in the evaluation of patients with a wrist ganglion due to a low prevalence of therapeutically significant findings [16].
• MRI provides relatively good reliability in establishing the diagnosis of an occult dorsal wrist ganglion, with a sensitivity of 83% when using intra-operative findings as the standard [27].
• MRI is an excellent diagnostic modality to evaluate rapidly growing upper extremity masses and distinguish ganglions from malignant processes [20].
• The 3-dimensional FSE extended echo train MRI sequence (cube) provides better visualization of intraneural ganglions and articular connections to the cyst [11].

Investigations

• Radiologists are less likely to identify occult dorsal ganglion cysts on MRI if the cyst is smaller or if the requisition form does not mention a cyst [63].
• Recent advances in MRI technology, specifically the 3-dimensional FSE extended echo train sequence called cube, have revolutionized the visualization of intraneural ganglions and the articular branches that connect them to the joint [11].
• High-resolution MRI techniques have the potential to improve patient outcomes by allowing better preoperative planning and more accurate surgical intervention [11].
• Routine wrist radiography is not cost-effective in the evaluation and treatment decision-making process for patients with a wrist ganglion due to a low prevalence of therapeutically significant findings [16].
• Sonography-guided wrist arthroscopy provides visualization of the ganglions and ganglion stalk, as well as of the arthroscopic shaver and adjacent structures such as nerves, vessels, and tendons [54].
• Sonography-assisted arthroscopic resection is a safer and more reliable method for treating volar wrist ganglia [30].
• A careful physical examination is essential to direct care and future testing if indicated, as diagnostic tests such as imaging can be expensive, time consuming, and often nonspecific [23].

Non-Operative Management

• Nonsurgical treatment is largely ineffective in treating ganglion cysts, though it may be considered for symptomatic relief in patients who do not want surgery [55].
• No recurrences were observed after a second puncture in the cohort assessed for percutaneous puncture of flexor tendon sheath ganglions [2].
• Most ganglions recur after aspiration [18].
• There is no consensus within the literature regarding the best management of pediatric wrist ganglia, and no single treatment modality confers a particular advantage or disadvantage over another [9].

Operative Management

• Open surgical excision offers significantly lower chance of recurrence compared with aspiration in the treatment of wrist ganglions [62].
• Surgical intervention has about a 10% recurrence rate, leaves scars, and has some risk for adverse events [18].
• Arthroscopy allows for the simultaneous treatment of ganglions and other pathologies [10].
• The outcomes, recurrence, and complications rates after 4 years of follow-up support the use of arthroscopy as a treatment for dorsal wrist ganglion [12].
• At 12 months follow-up, the rates of recurrence with arthroscopic dorsal ganglion excision are comparable with and not superior to those of open excision [17].
• Arthroscopic resection is an effective treatment strategy for intra-articular synovial ganglions refractory to conservative measures, providing complete resolution of symptoms and functional recovery with minimal soft tissue damage [51].
• Arthroscopic ganglionectomy through an intrafocal cystic portal is a safe and efficacious option for the treatment of painful wrist ganglia [52].
• Recurrent ganglion cysts originating from the midcarpal joint are not contraindications for arthroscopic resection [22].
• In patients with the clinical diagnosis of wrist ganglion cyst, the quality of care would not be compromised by abandoning the practice of routine submission of surgical specimens for pathological examination after excision of the ganglion cyst [13, 25].

Outcomes and Complications

• Recurrence of the wrist ganglion cyst occurred in five patients (9%) in a cohort of 53 patients undergoing arthroscopic resection [49].
• PRWE scores were significantly higher in patients with a recurrence (30 vs. 12, p = 0.002) following arthroscopic resection [49].
• Patients initially presenting with a new ganglion cyst had fewer recurrences at final follow-up compared with patients initially presenting with recurrence (4 vs. 15%, respectively) [49].
• Three of the 53 patients (6%) had a complication following arthroscopic resection of wrist ganglion cysts [49].
• One patient experienced neuropraxia of the radial superficial nerve, which resolved spontaneously [49].
• One patient developed extensor carpi ulnaris (ECU) tendinitis which was successfully treated with splinting [49].
• One patient experienced painful scar tissue, which was successfully removed surgically [49].
• Worse hand function was associated with recurrence following prior surgery, worse baseline hand function and lower treatment credibility [28].

Complications

• Surgical excision of flexor tendon sheath ganglions is considered a safe method with no specific complications reported in the cited study [1].
• Percutaneous puncture of flexor tendon sheath ganglions has a low recurrence rate, with no recurrences observed after a second puncture in the studied cohort [2].
• Volar wrist ganglions arising from the first extensor compartment or flexor carpi radialis (FCR) sheath may be difficult to distinguish from anterior wrist joint ganglions [7].
• Ganglion cysts arising from the FCR sheath are typically less mobile than ganglions arising from the wrist joint [7].
• Ganglions arising from the first extensor compartment tend to adhere to the sheath and are less mobile [7].
• Operation-related complications after arthroscopic volar wrist ganglionectomy are associated with the anatomical location of the cyst, specifically when it is distal to the bifurcation of the radial artery and concurrently penetrated up to the superficial fascia layer [21].
• Surgical intervention for wrist ganglions has a recurrence rate of approximately 10% [18].
• Surgical intervention for wrist ganglions leaves scars and carries some risk for adverse events [18].
• Open dorsal wrist ganglion excision in patients whose occupation or activities require forceful wrist extension is associated with a considerable risk of residual pain and functional limitations [70].
• Arthroscopic resection of dorsal wrist ganglions has recurrence and complication rates that support its use as a treatment option [12].

Recovery

• Surgical excision of a painful ganglion of the digital flexor tendon sheath is a simple, safe, and effective method [1].
• Percutaneous puncture for flexor tendon sheath ganglions has a low recurrence rate, with no recurrences observed after a second puncture in the studied cohort [2].
• Endoscopic ganglionectomy via flexor carpi radialis tendoscopy offers better cosmesis and less soft tissue trauma compared to other approaches [3].
• In children with a wrist ganglion, if the cyst resolves spontaneously, it usually does so within 18 months [14].
• In children aged <10 years, volar wrist ganglions are generally amenable to observation with spontaneous regression [15].
• Open surgical excision for pediatric wrist ganglions demonstrates a relatively low recurrence rate with minimal complications [15].
• Approximately 40% of wrist ganglion lesions decrease over the first 6 years after evaluation by a hand surgeon [18].
• Surgical intervention for wrist ganglions has about a 10% recurrence rate [18].
• Surgical intervention for wrist ganglions leaves scars and has some risk for adverse events [18].
• Routine midcarpal joint exploration during arthroscopic excision of dorsal wrist ganglions appeared to reduce recurrence at 1 year without negatively impacting patient outcomes [29].
• Complete resection of the ganglion stem and complete closure of the joint capsule is the most important step to avoid recurrences [71].

Key Evidence

• [L4] Surgical excision is a simple, safe, and effective method for treating a painful ganglion of the digital flexor tendon sheath. [1] (10.1007/s11552-007-9028-4)
• [L4] Percutaneous puncture is a practical option for managing flexor tendon sheath ganglions given its low cost, lack of downtime, and low recurrence rate, with no recurrences observed after a second puncture in this cohort. [2] (10.1177/17531934221115983)
• [Paper] Endoscopic ganglionectomy via flexor carpi radialis tendoscopy is a minimally invasive approach that offers better cosmesis, less soft tissue trauma, and the ability to manage concomitant FCR tendon pathology, though it carries risks of recurrence and nerve or vessel injury. [3] (10.1016/j.eats.2017.06.002)
• [L4] Pediatric ganglions are more commonly found on the volar surface of the hand and wrist and more commonly have tendon sheath origin compared to adults. [4] (10.1007/s11552-008-9122-2)
• [L3] Women are significantly more likely to be diagnosed with a volar wrist ganglion, regardless of age or military status. [6] (10.1016/j.jhsa.2016.08.008)
• [L5] [7] (10.1016/j.hcl.2004.03.015)
• [L4] There is no consensus within the literature regarding the best management of pediatric wrist ganglia, and no single treatment modality confers a particular advantage or disadvantage over another. [9] (10.1177/1558944720966716)
• [L4] Arthroscopy allows for the simultaneous treatment of ganglions and other pathologies. [10] (10.1016/j.jhsa.2012.04.042)
• [L4] [11] (10.1016/j.jhsa.2015.05.025)
• [L4] The outcomes, recurrence, and complications rates after 4 years of follow-up presented in this study support the use of arthroscopy as a treatment for dorsal wrist ganglion. [12] (10.1177/1558944717743601)
• [L4] In patients with the clinical diagnosis of wrist ganglion cyst, the quality of care would not be compromised by abandoning the practice of routine submission of surgical specimens for pathological examination after excision of the ganglion cyst. [13] (10.1016/s0363-5023(10)60107-4)
• [L4] In a child with a wrist ganglion, if the cyst ultimately resolved, it usually did so within 18 months. [14] (10.1016/j.jhsa.2019.10.032)
• [L4] [15] (10.1016/j.jhsa.2021.12.015)
• [L4] The study concludes that routinely performing wrist radiography is not cost-effective in the evaluation and treatment decision-making process for patients with a wrist ganglion due to a low prevalence of therapeutically significant findings. [16] (10.1007/s11552-007-9032-8)
• [L1] At 12 months follow-up, the rates of recurrence with arthroscopic dorsal ganglion excision are comparable with and not superior to those of open excision. [17] (10.1016/j.jhsa.2008.01.009)
• [L5] Current best evidence suggests that about 40% of lesions decrease over the first 6 years after evaluation by a hand surgeon, that most ganglions recur after aspiration, and that surgical intervention has about a 10% recurrence rate, leaves scars, and has some risk for adverse events. [18] (10.1016/j.jhsa.2010.11.048)
• [L4] MRI is an excellent diagnostic modality to evaluate rapidly growing upper extremity masses and distinguish ganglions from malignant processes. [20] (10.1007/s11552-007-9083-x)
• [L3] The operation-related complications after arthroscopic volar wrist ganglionectomy are associated with its anatomical location: distal to the bifurcation of the radial artery and concurrently penetrated up to the superficial fascia layer. [21] (10.1186/s12891-025-08766-x)
• [L4] Ganglion cysts also have a high association with certain interosseous laxities, and recurrent ganglion cysts originating from the midcarpal joint are not contraindications for arthroscopic resection. [22] (10.1016/j.jhsa.2008.11.025)
• [L3] This study suggests that, in patients with the clinical diagnosis of wrist ganglion cyst, quality of care would not be compromised by abandoning the practice of routinely submitting surgical specimens for pathological examination after excision of the ganglion cyst. [25] (10.1016/j.jhsa.2010.03.021)
• [L2] Ganglions in pediatric populations, which most commonly affect the dorsal wrist, demonstrate a female predilection. [26] (10.1016/j.jhsa.2021.02.026)
• [L3] MRI scans provide relatively good reliability in establishing the diagnosis of an occult dorsal wrist ganglion, with a sensitivity of 83% when using intra-operative findings as the standard. [27] (10.1177/1753193408092041)
• [L2] Worse hand function was associated with recurrence following prior surgery, worse baseline hand function and lower treatment credibility. [28] (10.1177/17531934231153029)
• [L3] Routine midcarpal joint exploration during arthroscopic excision of dorsal wrist ganglions appeared to reduce recurrence at 1 year without negatively impacting patient outcomes. [29] (10.1177/17531934251405730)
• [Paper] This method is safer and more reliable for treating volar wrist ganglia. [30] (10.1016/j.eats.2011.12.007)
• [L4] [49] (10.1055/s-0040-1716509)
• [L4] The proposed classification of ganglia helps minimize the area of resection required. [50] (10.1054/jhsb.2001.0620)
• [L4] Arthroscopic resection is an effective treatment strategy for intra-articular synovial ganglions refractory to conservative measures, providing complete resolution of symptoms and functional recovery with minimal soft tissue damage. [51] (10.1016/j.jhsg.2024.05.007)
• [L4] Arthroscopic ganglionectomy through an intrafocal cystic portal is a safe and efficacious option for the treatment of painful wrist ganglia. [52] (10.1016/j.arthro.2009.08.021)
• [L4] Sonography-guided wrist arthroscopy provides several advantages for surgeons, including visualization of the ganglions and ganglion stalk, as well as of the arthroscopic shaver and adjacent structures such as nerves, vessels, and tendons to perform surgery safely. [54] (10.1016/j.jhsa.2012.04.012)
• [L4] Nonsurgical treatment is largely ineffective in treating ganglion cysts, though it may be considered for symptomatic relief in patients who do not want surgery. [55] (10.1155/2013/940615)
• [L1] Open surgical excision offers significantly lower chance of recurrence compared with aspiration in the treatment of wrist ganglions. [62] (10.1016/j.jhsa.2014.12.014)
• [L3] Radiologists are less likely to identify occult dorsal ganglion cysts on MRI if the cyst is smaller or if the requisition form does not mention a cyst. [63] (10.1055/s-0039-1683847)
• [L4] [64] (10.2106/00004623-197254070-00009)
• [L4] Patients whose occupation or activities require forceful wrist extension should be counseled on the considerable risk of residual pain and functional limitations that may occur after open dorsal wrist ganglion excision. [70] (10.1016/j.jhsa.2015.05.030)
• [L4] Complete resection of the ganglion stem and complete closure of the joint capsule is the most important step to avoid recurrences. [71] (10.1007/s001670050073)
• [L5] [77] (10.1186/s12883-018-1229-7)

References

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