To image Bodipy FL c16 uptake during murine tumor growth and regression, 100 μL of 200 μM Bodipy FL c16 was injected via the tail vein and fluorescence microscopy images (field of view: 2.1 mm × 1.6 mm) of the mammary tumor were captured over a span of 80 min post-injection while mice were receiving ad libitum dox (tumor growth with MYC-on) or four days after withdrawal of dox (early tumor regression with MYC-off [50]). This evidence concerns the gene MYC and breast cancer.