I've had it for about a year and it is barely noticeable, only when I flex. It's grown from a pea to a bean in size during the past year or so. I bump my legs A LOT--very clumsy, and have another larger, irregular bump on my other leg that appeared after the area was very bruised (I don't remember hitting it, but could easily have and not noticed it). I also have an irregular wart-like growth about 2 inches from the smal lump, had it for at least 10 years, no oozing or crusting.
I'm a 50 year old female, non-smoker, healthy living. LOTS of sun exposure. Good health other than menopausal symptoms.