Is hepatocarcinoma hereditary _'s general knowledge

Is hepatocarcinoma hereditary _'s general knowledge
90% cause of disease of cancer the intersection of external cause and, heredity weight not accounted for minimum in cause of disease of tumour. Except that from the intersection of large intestine and the intersection of polyp and cancer of colon that disease develop of occuring frequently etc., person who colour it does skin carcinoma that leather diseases develops into to be substandard, other cancers are thought not to have clear relation with the inherent cause more. The family of having several people at the same time or first as to those or future trouble hepatocarcinoma, perhaps the common living condition, for example it is much more important than the inherent cause to exposed to the factor of a certain carcinogen together. In other words, although hepatocarcinoma can not be hereditary, certain family gathers inclination. The members who has ever happened in one in patient's family of hepatocarcinoma, should watch out for this disease.
Hepatocarcinoma has certain families to gather inclination, most scholars think at present:
1,The spreading vertically of B-mode hepatitis virus: Mother infected and become the long-term person who carries virus by hepatitis B and virus, may pass the virus to the neonate after or gives a birth at the time of the childbirth. Because the neonatal immunological function has not been sound yet, can't remove the virus and form and infect continuously effectively, so that chronic hepatitis, liver cirrhosis take place, develop into hepatocarcinoma finally.
2,The level of the B-mode hepatitis virus spreads: Hepatitis kinsfolks of patient keep in touch extremely close, have first infection hepatitis B and virus, very easy to bring disaster to other people unconsciously.
3,The eating habit, life style,etc. between whole family are basically the same too, the everybody's chance to exposed to the carcinogenic factor is basically equal too.
Many people have another explanation to suffer from cancer in a family. Its basic concept is, any cancer is that the result of mutation of twice takes place in the gene of cells. It was not family cancer patient that was distributed, these two changes both take place after being born in. And the cancer patient prone to family, before mother is pregnant, have already been attacked by this carcinogenic factor. When they born, internal cell have one kind apt to take place change of cancer already, so long as suffered the blow of the carcinogenic factor once again after being born in, cancer may take place, so suffer from the chance of cancer a less than general National People's Congress. This is famous " Attack the theory twice " .
No matter any explanations of the above, all prove hepatocarcinoma mainly result from external factor. So, has had the hepatocarcinoma patient's families already, it is unnecessary for other members to consider the heredity of hepatocarcinoma too much.
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