Why would CT scan show cancer spread but PET scan show none?

Different imaging tests can show varying results because they work in different ways - CT scans look at physical structure while PET scans measure metabolic activity of cells. This kind of discrepancy between scans does happen and can be confusing for families navigating treatment decisions. The medical team will likely consider both results along with other clinical factors to determine the next steps, so bringing these questions directly to the oncologist would be the best way to understand what these findings mean for the specific situation. Many community members have experienced similar uncertainty with scan results, so sharing experiences here might help provide additional perspective during this challenging time.