Hi, for what it's worth, my husband also had a missed diagnosis although the time frame was a tad shorter - 18 months. He was diagnosed three weeks go and went through CT scans and a PET scan and no spread of the cancer. Point being, don't despair - every case is different and it may still be local. Either way, please get the biopsy and necessary treatment asap because knowing is better than not knowing. Getting treatment started soon is the most important thing!