No PCR in saliva would reveal cancer markers. Cancer markers are mostly proteins detected in blood or urine, very little would be detected in saliva, and that would require biochemical tests, never a PCR. PCR can be used to detect genetic disposition to cancer, but that's not a diagnose method. Also, there's absolutely no way estrogen can be detected that way.
Flipped film: when the baby is first shown on ECMO, the numbers on the crib are reversed, and there is a net stocking on the baby's left leg. The view changes, the numbers are correct and the stocking is on the right leg. The view changes back to reversed numbers and left leg stocking.