The malignant tumor permanently cures with difficulty one of most main reasons is it has the shift characteristic. The shift is the tumour cell which referred to already infiltrated falls off, through certain ways or the channel, achieved with the primary stove is not connected even is far away from the process which the spot grew; Originally the spot grows the tumor is called the primary tumor, shifts the tumor which grows to other spots calls following to send the tumor or the shift lump, also calls the child the lump.
??Transition process??Tumour cell’s shift is many stage tendency continual processes. The first tumour cell attack breaks through the organization barrier to enter the blood vessel, the lymph vessel formative cell embolus, falls off along with it and moves in the blood or the lymph vessel, then adheres, the pause with the distant place internal organs microcycle endothelial cell, and puts on the microcycle, reproduces, the growth in the new organization organ essence to form the new shift lump. In addition, in the transition process, the cancer cell may also fall off directly in the body cavity, wears the bed to become the planter shift lump in the serosa face shape.
??Shift way
??Malignant tumor’s shift mainly passes the lymph vessel, the blood vessel and the body cavity. The blood vessel mainly through the vein, very few first passes the artery.
??1. lymph shift: The lymph shifts many according to the lymph dry rule shift, namely about the neck does, about the subclavian to do, about the bronchial tube mediastinum to do, about the menopause and the intestines does.
??2. blood shift: The blood road shifts many according to the body vein, the pulmonary vein, the portal vein, the awl vein and the adverse current.
??3. planter shift: The tumour cell diffused grows in the cavity crack, like chest cavity, abdominal cavity, pericardiac cavity and so on. The surgery, the puncture process may also create the planter shift.
??Influence shift factor
??(1) tumor partial factor: Including the tumor size, the growth speed, the split up degree, the pathology type, the tumour cell metabolism characteristic, the motor ability, the year welfare, the enzyme production, the surface texture and the electric charge, the tumor vascularization brings in foreign capital, cancer cell DNA
Structure changes and so on. In the ordinary circumstances the tumor is bigger, the malignant degree is higher, the growth speed is quicker, easier to shift.
??(2) whole body factor: The malignant tumor besides receives the partial factor influence, but also receives many whole body factors the influence, including:?Immunologic function: Organism immunologic function to the tumor occurrence vital role, similarly, in the tumor shift’s process, the immune state normal or not is having the speed display leading role which to the shift sooner or later and the shift lump will grow. Immune state good may suppress the tumor shift, causes the tumor long time to stabilize is at from limits the condition, but when organism immune system protection tumor’s ability reduces may present the early shift.
???Hemoglutination mechanism: The tumor has the shift to adheres, the fibrin encystation after the tumour cell and the blood vessel endothelial cell, to form the lump hitch and so on a series of processes. During this process the hemoglutination and the anti-hemoglutination mechanism has brought to people’s attention generally the shift function. The research discovered that the cancer cell own may produce presses the hemoglutination factor to cause its to be advantageous adheres in the blood vessel epidermis, promotion shift.
???Extraneous factor: Is mainly the human factor to the tumor the influence.
