That makes number 4:

Just got home from my cousin's funeral. His family is in shock over his quick demise. He had a small cancer on his forehead removed 4 months ago. His doctor assured him he was cancer free. A month later his neck was cancerous and despite their best chemo and radiation the cancer soon involved his entire body. From pimple on his forehead to dead in 4 months. One of his doctors is stumped and said he has never seen anything like it. His oncologist says she has seen quite a few of them in the last year. So what has happened in the last year that has been shown to cause very aggressive cancers?