Muscle fiber (Muscle fiber) belongs to the muscle tissue components, composed of myocytes, according to the morphological and functional characteristics, muscle fiber can be divided into smooth muscle (also known as transverse muscle), skeletal muscle, cardiac muscle. There are various methods for staining myofibers, such as Li Chun red method, aniline blue method, tungsten phosphotungstic acid hematoxylin method, etc.; ellagic acid - azofluorescent peach staining method is the use of two kinds of acidic dyes successive action and complete the identification of staining.

Azo-fluorescent peach staining solution its staining principle lies in tannic acid easily into the permeability of the collagen fibers, collagen fibers were yellow; azo-fluorescent peach easily into the permeability of the muscle fibers, muscle fibers were red, azo-fluorescent peach staining solution is used to differentiate between the muscle fibers and collagen fibers, the contrast is clear, should not be faded, and at the same time can show the myoepithelial cells, and can be used in the diagnosis of the mammary gland and the skin and so on myoepithelial cell tumors.