Tumor cell nuclei of normal cells in the morphological difference, reflected in the cell volume, size, the morphology of the cell nucleus and so on. 1. The volume of cells: normal cells are more balanced, while the volume of tumor cells varies greatly, part of which can be manifested as increased volume, part of which can be manifested as original small cells. 2. Cell size: the normal cell size is average, while the tumor cell size is inconsistent, often appearing tumor giant cells. 3. Morphology of cell nucleus: most of the normal cells have only one nucleus, while the nucleus of tumor cells often has double nuclei, multiple nuclei or odd shaped nuclei, and may also show splitting phenomena, such as asymmetric nuclear division, multipolar nuclear division and so on. If tumor cells are found in laboratory tests, it is recommended to go to regular hospitals to avoid delay.