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What Causes Hard Bump Below Kneecap?

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Posted on Wed, 1 Jul 2015
Question: I have a small hard bump about an inch below knee cap that I just noticed when my leg was stretched out. It's painless
doctor
Answered by Dr. Grzegorz Stanko (32 minutes later)
Brief Answer:
Photo is needed to answer this question.

Detailed Answer:
Hello!

Thank you for the query.

Can you please attach a photo of it? It will greatly help with proper diagnosis.
Since when you have this bump? Is there similar bump on the other leg?

Bump in this location can be a benign skin lesion (like lipoma) or just a bone structure which is not a pathology.
Lipoma is usually movable bump. It never gives any pain. It slowly grows.

Bone part is usually hard as a bone and not movable. The only reason to concern is rapidly growing bump. Other cases are rather not serious.

I suggest you to keep it under observation. If it will be getting bigger, consult your doctor and have an ultrasound done.

Hope this will help. Feel free to ask further questions.
Regards.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Grzegorz Stanko (1 minute later)
Looks pinkish
doctor
Answered by Dr. Grzegorz Stanko (2 minutes later)
Brief Answer:
Sebaceus cyst.

Detailed Answer:
This is a sebaceus cyst. Benign lesion. It is filled with whitish masses and covered with a capsule. It should be removed as it tends to get infected and turn into an abscess. Please consult general surgeon.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Grzegorz Stanko (18 minutes later)
My only concern is that it's very hard and seemed to pop up suddenly. Here's another picture of both knees to compare. Thank you
doctor
Answered by Dr. Grzegorz Stanko (12 minutes later)
Brief Answer:
It has to be removed completely.

Detailed Answer:
It could pop up. But it will regrow until the capsule wont be removed. Its is not concerning. It just may cause some pain if will be left alone. But nothing more.
Note: For further queries, consult a joint and bone specialist, an Orthopaedic surgeon. Book a Call now.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
Dr.
Dr. Grzegorz Stanko

General Surgeon

Practicing since :2008

Answered : 5795 Questions

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What Causes Hard Bump Below Kneecap?

Brief Answer: Photo is needed to answer this question. Detailed Answer: Hello! Thank you for the query. Can you please attach a photo of it? It will greatly help with proper diagnosis. Since when you have this bump? Is there similar bump on the other leg? Bump in this location can be a benign skin lesion (like lipoma) or just a bone structure which is not a pathology. Lipoma is usually movable bump. It never gives any pain. It slowly grows. Bone part is usually hard as a bone and not movable. The only reason to concern is rapidly growing bump. Other cases are rather not serious. I suggest you to keep it under observation. If it will be getting bigger, consult your doctor and have an ultrasound done. Hope this will help. Feel free to ask further questions. Regards.