My SO has had a mass between his knee and shin for almost 5 years now. It feels hard and does not cause him any pain. It is raised off the skin and is slightly smaller than a dime. I am very curious to find out what this mass is or what has caused it. Especially since within the last two months a second hole has appeared. The only medical history he has is a ruptured spleen from a motor vehicle accident. He does however smoke cigarettes.
Here are some photos: http://imgur.com/a/pH64u