Often someone says, period of time was checked before not bad good, how so fast have to cancer? Actually, cancer is not this paragraph of time to just be gotten, you can say only at most, examination of period of time still does not have fish problem before, is not before period of time did not get cancer, these a few months have to cancer, " " it is to be done not have before, had now, examination, be will already some fish come, the likelihood does not have the examination of this respect before, other examination result is normal, it is all and normal to be equal to, for instance exsanguinate checks tumor to indicate other people is normal, differ to get cancer at doing not have; Also may be to check method itself to have limit, all examinations are not all-purpose, have limit.
How long does the formation of cancer need after all? This problem should be limitted above all, so called cancer is formed is to point to become cancer cell from normal cell, next cancer cell grows current and clinical on the size that can detect (it is to point to normally about 1cm size) .
Cancer cell is from normal cell different changes come over, below the action of elements of all sorts of inside and outside, normal cell produces a change, became cancer cell, if be a cancer cell only, or a few a few cancer cell, this pair of human body of course compose does not browbeat into what, there are a few a few bad people in resembling powerful nation cannot become climate, human body has powerful immune system, can keep clear of element of this kind of alien at any time or restrain, perhaps we have cancer cell at the moment inside the body of most person, but cannot say you got cancer, this kind does not have the cancer cell of make good, you are basic negligible it (also cannot treat sth lightly completely of course, if your oneself interior gave an issue, it begins possibly also to encourage wind joke wave) . And in fact, this also can be theoretic only guess, this minority cancer cell is had to exist after all inside your body, accomplish hard still at present accurate detect. What we should discuss now is not this, however next problem.
Once cancer cell is formed, some perhaps can be kept clear of by immune system, but always have cancer cell the attack that it can evade immune system, undertake mitosis ceaselessly thereby, resemble normal cell same, become two from, become 4 from two, become 8 from 4... form cellular group, split up next and form constituent organ, and Where is cancer cell? It also is such, ceaseless mitosis, form cancer cell group, cellular number is more, this cell group is bigger, in this process, also be kept clear of possibly by immune system place at any time, but if it is successful those who escape immune system is cleared, can continue " snowball " appearance grows, cellular group is bigger and bigger, be brought up how old be the cancer that we think? We say some is such-and-such normally got cancer, it is to pass an examination to diagnosed him to get cancer of course, namely naked eye or have the aid of detect at video method cancer, too small do not detect or cannot affirm, is this borderline how old normally? By the cell number calculates, it is 10 9 times about square a cancer cell, size is 1cm about, we say this time you got cancer. Very apparent, can diagnose the earliest this momently, not be cancer cell just was formed, it grew for a long time in the dissension inside body actually. The head fills: 1 million cancer cell gather together, size makes an appointment with 1 millimeter, 1 billion (10 9 square) cancer cell gathers together, size makes an appointment with 1cm. This moment, can detect commonly come out, can diagnose. Of course, detect possibly also earlier or diagnose come out, but can take seriously not quite commonly, diagnose harder perhaps, we serve as node with 1cm commonly.
Does that tumour grow 1cm to need how long? This is planted with cancer actually about, that is to say, speed of different cancer cell hyperplasia is different, said in front, cancer cell undertakes mitosis ceaselessly, all the time times add (one changes two, two change 4, 4 change 8... ) go down, different cancer, this times increasing time is different, some times increase time very short, so it grows fast, perhaps a few months formed us to be able to detect the tumour that go out, and some tumor cells, times increase time longer, so it needs very long time ability to form clinical the tumor size that can detect, for instance a few years, ten years, even a few years, this is not certain, should looking is which kinds of tumour. Nevertheless, overall for, most and hypostatic tumour (namely us most often hear those cancer, for instance cancer of cancer of rectum of lung cancer, knot, breast cancer, esophagus) , begin of canceration to grow 1cm size momently then from the cell, little criterion a few years, many more than 10 years, a few years, need normally 8 control to 10 years, the likelihood is a few longer, likely also a few shorter, unlikely a few days a few months grow a few weeks 1cm size. And when tumor grows 1cm, a lot of people still do not have discovery, tumor continues to grow of course, in real life, a lot of people diagnose a day that when give cancer truly, cancer is more than already 1cm size, actually, when tumor grows 1cm size, it continued to grow period of time inside body again, or wh what month, or a few years, even some more than 10 years or longer, come so, to him character, the cancer that he thinks forms time is to point to those who diagnose this momently, meet between in those days longer.
Visible, the formation of cancer is not one day blossoms, a certain person is diagnosed gave cancer, not be to say he is recently the cancer that these a few months just get, actually this his cancer had grown in his body very long period of time, little criterion a few years, ten years even a few years, before just growing 1cm, clinical go up to still detect do not come out, or you did not take seriously, did not go checking.
This also hints we, actually, a person is diagnosed gave cancer, actually cancer grew very long period of time inside his body, if enough take seriously, can discover it as early as possible and diagnose come out, can begin therapy as early as possible so. Of course, this also is opposite only, because at present medicine checks the limitation of the method, a lot of cancer still are hard to accomplish really inchoate diagnose, all can go with the best will in the world only early diagnose. If had grown 1cm above bigger perhaps, you were not checked, miss the earliest diagnostic opportunity possibly.
