Hard lump (feels like bone) under kneecap. Def not on right leg. Only left, and no pain. I exercise a lot (basketball and running). Any help on what this is? : r/AskDoctorSmeeee
6 Painless Lump on Knee Causes | What You Need to Know
Swelling On Top Of Knee: Causes & Treatment
Lump on the side of knee: do you have a meniscal cyst?