Blood vessel in a melanoma, SEM

Colour-enhanced, freeze-fracture scanning electron micrograph of a blood vessel that has grown into a melanoma and is providing nourishment to it. Numerous red blood cells (coloured red) and three white blood cells (coloured yellow) can be seen within the blood vessel (coloured yellow/green). This is surrounded by the melanoma (coloured brown) which is from mouse skin. Horizontal width of image is approximately 230 micrometres. Biomedical Image Awards 2002.