I'm new to this board. I was diagnosed with Stage 4 melanoma (unknown primary) 3 years ago. Following a CT scan for an unrelated ailment, the doctor found a single tumor in my sacrum which was removed surgically and treated with a gamma knife. Since then, I have thankfully been NED. Although I am adjusting to this life changing event, I still worry that it will return. I'd like to hear from others who have survived Stage 4 and especially those who may have experienced recurrance. I'd like to know how long before recurrance, severity when it returned, and generally what I might need to expect. I realize that Stage 4 isn't good and I'm aware of the prognosis, however, I've heard of people who have been Stage 4 for decades and I'd like to hear from more that have similar circumstances.