Light micrograph of cells of a solitary fibrous tumour, a type of growth that can occur in the soft tissues of the body. The tumour cells have spindled nuclei (dark purple) and are present within variable amounts of collagen substance (pink). A few red blood cells in capillaries (bright red) are also seen in this image. Haematoxylin and eosin stained tissue section. Magnification: x400 when printed at 10cm wide.