Ganglion Cyst
Ganglion cysts are the most common soft tissue mass in the hand and wrist, representing 50-70% of all masses identified in these locations. 1, 2
Clinical Characteristics
Ganglion cysts are benign soft tissue swellings filled with gelatinous, mucoid material that most commonly occur on the dorsal or volar aspects of the wrist. 1, 3
These cysts can also arise from flexor tendon sheaths, interphalangeal joints, extensor tendons, and rarely present as intraosseous or intraneural variants. 1
Most ganglion cysts are asymptomatic aside from the visible swelling, though some patients experience pain, weakness, or paresthesia. 3
The two primary patient concerns are cosmetic appearance and fear of malignant transformation (which does not occur). 3
Natural History
58% of ganglion cysts will resolve spontaneously over time without any intervention. 3
This high rate of spontaneous resolution makes observation a reasonable first-line approach for asymptomatic or minimally symptomatic cysts. 3
Diagnosis
Diagnosis relies primarily on history and physical examination, with transillumination and aspiration serving as useful diagnostic adjuncts. 1
Aspiration typically yields thick, gelatinous fluid with cytology showing rare histiocytes embedded in a mucoid matrix. 4
Radiography and ultrasonography may be indicated to evaluate for associated degenerative joint disease or to exclude solid masses. 1
MRI is reserved for cases where occult ganglions, intraosseous ganglions, or solid tumors including sarcoma remain diagnostic concerns. 1
Treatment Approach
For patients seeking symptomatic relief as their primary goal, conservative management is preferred, while surgical excision is indicated when preventing recurrence is the priority. 3
Conservative Management
Nonsurgical treatment options include observation, aspiration or puncture with possible corticosteroid injection. 1
Conservative management can result in cyst resolution in over 50% of patients. 1
Surgical interventions do not provide better symptomatic relief compared to conservative treatment. 3
Surgical Management
Surgical excision is associated with recurrence rates of 7-39%. 1
Surgery has a lower recurrence rate than conservative management but carries a higher complication rate and longer recovery period. 3
Arthroscopic ganglion excision has recurrence rates similar to open surgical techniques. 1
Important Clinical Pitfall
- While ganglion cysts most commonly occur on the hand and wrist, they can present in unusual locations such as the back, and should remain in the differential diagnosis for any subcutaneous soft tissue mass regardless of location. 5