Diagnosis is commonly made by magnetic resonance imaging. Cysts at the base of the finger on the palm side are typically very firm, pea-sized nodules that are tender to applied pressure, such as when gripping. These arise from the flexor tendon sheath.
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Ganglion cysts are usually oval or round and may be soft or firm. There are different types of growths that can occur around the and wrist, and additional imaging is sometimes required.
Excision is usually curative although a minority recur. The manoeuvre often causes discomfort to a normal wrist and it is therefore wise to compare the unaffected side.