I was diagnosed with non cell lung cancer Stage IA in Nov 2006. Before my surgery I had a PET scan. it showed a hot spot in in my LT pelvic region. Because I just had bladder surgery (bladder lift) I did not follow up on the pelvic hot spot. Now 3 months after my surgery I had another PET scan that showed uptake again in my left pelvic region. I had a ultrasound that was basically negative (small fibroid). Now they want me to have an MRI. Has anyone heard of false positive PET scans?? This is all making me nervous.