A 28-year-old male waiter presents to your office complaining of a growth on the back of his left hand. He states it started slowly months ago but has now enlarged enough to be embarrassing. He states it only hurts when he is holding a tray of food up in the air with his left hand. He has no significant past medical history and no one else in the family has this problem. On exam, you note a 2-cm round cystic-like lesion on the dorsum of his left wrist over the carpals. It is more prominent when he flexes his wrist. What is the most likely cause of his hand swelling?

(A) Ganglion

(B) Chronic tophaceous gout

(C) Acute rheumatoid arthritis

(D) Heberden's nodes

Ganglion cyst is a noncancerous fluid-filled bump, formed at the tendon sheath or joint. It generally occurs at the back of the hand, followed by front of hand. The cyst may be accompanied by pain or numbness. Generally, there are no other symptoms and the cause is unknown.

The average size of the ganglion cyst is 2 centimeters. The size of the ganglion cyst varies over time.

The most likely reason for the hand swelling is Ganglion.