I have a lump on the inner side of my knee, about an inch from the patella. It's about one cm. in diameter, is visible below the skin, is very slightly tender to the touch, and doesn't cause any pain when I move. I'm 32 and active. Should I have it looked at, or does it sound like some kind of cyst?
The lump seems to my untrained eye to be at the middle of the joint line, but off to the inside. It does seem to protrude more or less with flexion and extension. I guess you could say it "hides" a bit when I extend my leg. But I can always see it. My husband thinks it seems to be attached to the tibia.
Pain and swelling or only focal mass at the level of the joint, and mass that change in size with knee flexion/extension is suggestible for meniscal cyst.
Can, you, visit your doctor and ask him for refferal for some imaging techique (if she/he suspects the same)?
MRI is usually the choice for diagnosing meniscal cyst.