A 26-year-old female golfer has a bump on her wrist after several tournaments. What might the doctor diagnose?

A ganglion cyst is a common diagnosis for a bump on the wrist, especially in athletes and those who engage in repetitive wrist activities like golfing. These cysts are noncancerous lumps filled with a gelatinous fluid that can develop near joints or tendons in the hand or wrist. They often arise as a result of irritation or trauma, making them particularly prevalent among individuals who frequently use their wrists.

In this scenario, the golfer's recent tournaments likely involved repetitive motions that can lead to irritation and the formation of a ganglion cyst. The presence of a well-defined bump aligns with the typical appearance of a ganglion cyst, and these bumps can fluctuate in size over time.

Other conditions such as wrist fractures or tendinitis might present with pain or limited mobility rather than a noticeable bump, and carpal tunnel syndrome typically involves symptoms related to nerve compression, like tingling or numbness, rather than a distinct swelling. Thus, given the information about the bump and the patient’s activity level, a ganglion cyst is the most fitting diagnosis.