### Patient: Doctor, I've been experiencing some hand or finger pain, along with stiffness and tightness. I've also noticed a lump or mass on my elbow. What could be causing this?
### Doctor: Based on your symptoms, it sounds like you may have lateral epicondylitis, also known as tennis elbow. This is a condition where the tendons in your elbow become inflamed, causing pain and stiffness in your hand or fingers. The lump or mass you've noticed could be a result of the inflammation.