I have a growth coming from my left leg groin muscle.  It is approximately 2 1/2 inch in length and about the size of a large pencil (like the ones we used in first grade).  It has been there for years with no problems.  But not, it seems to be getting bigger.  I felt it's path from the top to bottom and it seems to be coming from my groin muscle.  I am thinking it is a cancer tumor.  Any ideas?