Process by which cells become specialized to perform a particular function. In the anatomopathological examination, the predominant tumor cells can be classified according to their degree of differentiation:
Undifferentiated or poorly differentiated: cells that have lost their specialization characteristics and look little like the normal cells of the organism.
Moderately differentiated: cells that maintain some degree of specialization and that have some similarity to the normal cells of the organism.
Well differentiated: cells that preserve many features of specialization and that bear good resemblance to the normal cells of the organism