[The role of the modal class of cells in the neoplastic process].

Cytophotometric findings point to a feedback link between tumor influence and remote organs and tissues in a tumor-bearing body, an important factor being whether tumor cells are located to the right or left of the modal class of normal cells of an organ. It is also important that the functional activity pattern of tumor cells genome match that of normal organ cells (Kfagen's ratio) and the number of tumor cells does not exceed that of normal cells by more than 33%.