The definition of tissue repair cells was proposed. “Tissue repair is a cell group with characteristic features; round or oval in nuclear shape, prominent nucleoli, fine granular chromatin pattern, moderate anisonucleosis and relatively abundant cytoplasm, deriving from reparative tissue. Neoplasia should be ruled out in tissue repair”
Cellular origin of tissue repair cells, differential diagnosis between tissue repair cells and cells from neoplasia, and histology from which tissue repair cells were derived were discussed.