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It occurs when blood vessels provisioning the heart are blocked, preventing appropriate oxygen to this organ. The heart muscle dies or is permanently injured. Doctors call this a myocardial infarction. Read the rest of this entry »
Radiotherapy is a method capable of destroying tumor cells, using beam of ionizing radiation.
A pre-calculated dose of radiation is applied at a given time, a volume of tissue encompassing the tumor, seeking to eradicate all tumor cells, with the least possible damage to surrounding normal cells at the expense of which will make the regeneration the irradiated area.
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The most widely used anticancer agents in cancer treatment include polyfunctional alkylating, antimetabolites, antitumor antibiotics, mitotic inhibitors and others.
New drugs are continuously being isolated and applied experimentally in animal models before use in humans. Read the rest of this entry »
The biggest failure of anticancer chemotherapy is due to drug resistance. This resistance occurs because the cell populations or develop new encoding gene (mutation) or because they are encouraged to develop cell types resistant to being exposed to drugs, allowing them to engage in alternative pathways through the synthesis of new enzymes.
To avoid the toxic effects of chemotherapy and intolerable that they endanger the lives of patients, are obeyed criteria for the indication of chemotherapy. These criteria are varied and depend on the patient’s clinical conditions and drugs selected for treatment. Below are listed some requirements ideal for the application of chemotherapy:
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Chemotherapeutic agents do not act exclusively on tumor cells. The normal structures that renew themselves constantly, as bone marrow, hair and mucosa of the gut are also affected by the action of chemotherapy.
However, because normal cells have an expected recovery time, unlike the anaplastic cells, it is possible that chemotherapy is applied repeatedly, since the observed time interval required for the recovery of bone marrow and the lining of the gut. For this reason, chemotherapy is applied in periodic cycles.
All of a sudden your old husband, that used to be tired, dispirited, with low morale definitely begins to show an anomalous excitement. Read the rest of this entry »
The agents used in cancer treatment affects both the normal and neoplastic cells, but they cause more damage to malignant cells than to normal tissues due to quantitative differences between the metabolic processes of these two cell populations.
The cytotoxic are not lethal to tumor cells selectively. Differences between the growth of malignant cells and normal cells and small biochemical differences observed between them probably combine to produce their specific effects.
Chemotherapy is the method that uses chemicals, called chemotherapy in the treatment of diseases caused by biological agents.
When applied to cancer, chemotherapy is called antineoplastic chemotherapy or chemotherapy antiblastic.
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