A ganglion cyst is a tumor or swelling on top of a joint or the covering of a tendon (tissue that connects muscle to bone). It looks like a sac of liquid (cyst). Inside the cyst is a thick, sticky, clear, colorless, jellylike material. Depending on the size, cysts may feel firm or spongy.
Ganglion Cyst Symptoms
The ganglion cyst usually appears as a bump (mass) that changes size.
It is usually soft, anywhere from 1-3 cm in diameter, and doesn't move.
The swelling may appear over time or appear suddenly, may get smaller in size, and may even go away, only to come back at another time.
Most ganglion cysts cause some degree of pain, usually following acute or repetitive trauma, but up to 35% are without symptoms except for appearance.
If pain is present, it is usually chronic and made worse by joint motion.
When the cyst is connected to a tendon, you may feel a sense of weakness in the affected finger.