Development of cancer

Rak može nastati zbog pojačane proliferacije različitih vrsta stanica koja se ogleda u poremećenoj kontroli staničnog ciklusa i nepostojanju dodirne inhibicije u kontaktu s drugim stanicama. Razlikujemo dobroćudne tumore koji ostaju ograničeni na mjestu na kojem su nastali od zloćudnih koji se mogu proširiti na ostale organe u tijelu. Fizikalni i kemijski karcinogeni mogu oštetiti DNA i uzrokovati mutacije te pridonijeti nastanku raka stimulirajući proliferaciju stanica. Virusi također mogu uzrokovati nastanak raka. Cilj ovog završnog rada je dati općeniti pregled procesa nastanka raka na molekularnoj i staničnoj razini.Cancer may result as a consequence of increased cell proliferation of any type which is manifested in aberrant cell cycle control and absence of contact inhibition upon physical contact with other cells. The tumors can be benign, remaining at the place of origin, and malignant which can spread on other bodily organs. Physical and chemical carcinogens can damage DNA causing mutations and contributing to growth of cancer by stimulating cell proliferation. Viruses can also cause cancer. Purpose of this paper is to give a general overview of cancer growth process on molecular and cellular level