Cause, clinical and ultrasound findings
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Inflammatory arthritis, athletic activity or injury may cause a ganglion.
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Pain and swelling are typical.
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The tendon sheath is distended with fluid and possible synovial tissue (tenosynovitis), with a large amount of low-echo ‘fluid’ either in a separate ‘sac’ or distending the tendon sheath massively.
Equipment and drugs
| Syringe | Needle | Lidocaine 1% | Methylprednisolone 40 mg/mL (Depo-Medrone) a | Bupivacaine hydrochloride 0.25% (Marcaine) a | Normal saline (0.9%) |
| 5 mL | 23G Blue | 5 mL | |||
| 20 mL | 18G White | 1 mL | 2 mL | 5 mL |
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