Hard Lump On The Knee, No Pain, Malignancy Chances?

Posted on Sun, 4 Sep 2011

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Sun, 4 Sep 2011 Answered on

Wed, 30 May 2012 Last reviewed on

Question : I CAN FEEL AND SEE A SMALL HARD LUMP UNDER MY KNEE ON THE BONE ITS NOT PAINFUL

Answered by Dr. Dr. Rakhi Tayal (1 hour later)

Hello,

Thanks for writing to us.

A small bony hard lump on your knee can be-
1. Tibial tuberosity- it is a part of the tibia bone and since it is subcutaneous it can be more prominent specially in runners.
2. A sesamoid bone formed in the tendon of quadriceps.
3. A sebaceous cyst- a swelling in the skin not attached to bone.
4. A foreign body.

You can get an X-ray of the knee joint or MRI done to find out the cause of such a hard swelling. You can consult an Orthopaedic surgeon accordingly.

I hope my answer and recommendations are adequate and helpful. Waiting for your further follow up queries if any.

Regards.

Above answer was peer-reviewed by : Dr. Raju A.T

Follow up: Dr. Dr. Rakhi Tayal (43 minutes later)

I am panicing in case its cancer, I am 52 not a runner, it looks abit red over the lump, but not sore, its about 1/2 inch below knee

Answered by Dr. Dr. Rakhi Tayal (8 hours later)

Hello.
Thanks for writing again.
From your description it is not likely to be cancerous but getting an MRI done is the best way to know the cause.
Wishing you an early recovery.
Regards.

Above answer was peer-reviewed by : Dr. Raju A.T