My friends cancer came back in three places, his lungs, kidneys and liver, and was taking medicatlion for it, because he was to ld that s all they could do and gave him about two years, but now he s saying the cancer is gone but he has to take chemotheraphy because he has some residue in his lungs, I have never heard of this, he s having a port catherer put in tomorrow to start the chemotheraphy, I want to know is there such a thing as lung residue, and it s been a year and a half since his diagnosis.