A common variant is
Lillie's trichrome. It is often erroneously called Masson's trichrome. It differs in the dyes used, their concentrations, and the immersion times. Another common variant is the
Masson trichrome & Verhoeff stain, which combines the Masson trichrome stain and
Verhoeff's stain. This combination is useful for the examination of
blood vessels; the Verhoeff stain highlights
elastin (black) and allows one to easily differentiate small arteries (which typically have at least two elastic laminae) and veins (which have one elastic lamina). ==See also==