Jumat, 23 April 2010

Cancer Signs and Symptoms

Cancer Symptoms Introduction

Cancer often has no specific symptoms, so it is important that people limit their risk factors and undergo appropriate cancer screening. Most cancer screening is specific to certain age groups and your primary-care doctor will know what screening to perform depending on your age. People with risk factors for cancer (for example, smokers, heavy alcohol use, high sun exposure, genetics) should be acutely aware of potential cancer symptoms and be evaluated by a physician if any develop.

Consequently, individuals need to know which symptoms might point to cancer. People should not ignore a warning symptom that might lead to early diagnosis and possibly to a cure.

Cancer Signs and Symptoms

Cancer gives most people no symptoms or signs that exclusively indicate the disease. Unfortunately, every complaint or symptom of cancer can be explained by a harmless condition as well. If certain symptoms occur, however, a doctor should be seen for further evaluation. Some common symptoms that may occur with cancer are as follows:

Persistent cough or blood-tinged saliva

These symptoms usually represent simple infections such as bronchitis or sinusitis.
They could be symptoms of cancer of the lung, head, and neck. Anyone with a cough that lasts more than a month or with blood in the mucus that is coughed up should see a doctor.


A change in bowel habits

Most changes in bowel habits are related to your diet and fluid intake.
Doctors sometimes see pencil-thin stools with colon cancer.
Occasionally, cancer exhibits continuous diarrhea.
Some people with cancer feel as if they need to have a bowel movement and still feel that way after they have had a bowel movement. If any of these abnormal bowel complaints last more than a few days, they require evaluation.


Blood in the stool

A doctor always should investigate blood in your stool.
Hemorrhoids frequently cause rectal bleeding, but because hemorrhoids are so common, they may exist with cancer. Therefore, even when you have hemorrhoids, you should have a doctor examine your entire intestinal tract when you have blood in your bowel movements. With some individuals, X-ray studies may be enough to clarify a diagnosis.


Colonoscopy is usually recommended.

Sometimes when the source of bleeding is entirely clear (for example, recurrent ulcers), these studies may not be needed.


Rabu, 14 April 2010

Antibody

PURPOSE: antibody treatment increased survival of patients with resected colorectal cancer of stage Dukes' C. Since the 5- year analysis was criticized because of the wide range (2.7 to 7.5 years) of follow-up time, we performed a 7-year analysis with only four of 189 patients monitored for less than 5 years. PATIENTS AND METHODS: A total of 189 patients with resected Dukes' C colorectal cancer were randomly allocated to infusions of a total of 900 mg 17-1A antibody, 500 mg postoperatively followed by 4 monthly doses of 100 mg (n=99), or to observation only (n=90). Primary end points were overall survival and disease-free interval. Patients were stratified by a dynamic randomization according to center, sex, location of tumor, number of affected lymph nodes, and preoperative carcinoembryonic antigen concentration. RESULTS: Randomization produced balanced distribution of risk factors. After 7 years of follow-up evaluation, treatment had reduced overall mortality by 32% (Cox's proportional hazard, P < .01; log-rank, P=.01) and decreased the recurrence rate by 23% (Cox's proportional hazard, P < .04; log-rank, P=.07). The intention-to-treat analysis gave a significant effect for overall survival (Cox's proportional hazard, P < .01; log-rank, P=.02) and disease-free survival (Cox's proportional hazard, P=.02; log-rank, P=.11 ). While distant metastases were significantly reduced (Cox's proportional hazard, P=.004; log-rank, P=.004), local relapses were not (Cox's proportional hazard, P=.65; log-rank, P=.52). This differential effect of 17-1A antibody on disseminated isolated tumor cells versus occult local satellites may explain the increased significance seen in the overall survival. CONCLUSION: The now-matured study shows that 17-1A antibody administered after surgery prevents the development of distant metastasis in approximately one third of patients. The therapeutic effect is maintained after 7 years o
Minggu, 11 April 2010

Cancer

Cancer is a class of diseases in which a group of cells display uncontrolled growth (division beyond the normal limits), invasion (intrusion on and destruction of adjacent tissues), and sometimes metastasis (spread to other locations in the body via lymph or blood). These three malignant properties of cancers differentiate them from benign tumors, which are self-limited, and do not invade or metastasize. Most cancers form a tumor but some, like leukemia, do not. The branch of medicine concerned with the study, diagnosis, treatment, and prevention of cancer is oncology.

Cancer affects people at all ages with the risk for most types increasing with age. Cancer caused about 13% of all human deaths in 2007 (7.6 million).

Cancers are caused by abnormalities in the genetic material of the transformed cells. These abnormalities may be due to the effects of carcinogens, such as tobacco smoke, radiation, chemicals, or infectious agents. Other cancer-promoting genetic abnormalities may randomly occur through errors in DNA replication, or are inherited, and thus present in all cells from birth. The heritability of cancers is usually affected by complex interactions between carcinogens and the host's genome.

Genetic abnormalities found in cancer typically affect two general classes of genes. Cancer-promoting oncogenes are typically activated in cancer cells, giving those cells new properties, such as hyperactive growth and division, protection against programmed cell death, loss of respect for normal tissue boundaries, and the ability to become established in diverse tissue environments. Tumor suppressor genes are then inactivated in cancer cells, resulting in the loss of normal functions in those cells, such as accurate DNA replication, control over the cell cycle, orientation and adhesion within tissues, and interaction with protective cells of the immune system.

Definitive diagnosis requires the histologic examination of a biopsy specimen, although the initial indication of malignancy can be symptomatic or radiographic imaging abnormalities. Most cancers can be treated and some cured, depending on the specific type, location, and stage. Once diagnosed, cancer is usually treated with a combination of surgery, chemotherapy and radiotherapy. As research develops, treatments are becoming more specific for different varieties of cancer. There has been significant progress in the development of targeted therapy drugs that act specifically on detectable molecular abnormalities in certain tumors, and which minimize damage to normal cells. The prognosis of cancer patients is most influenced by the type of cancer, as well as the stage, or extent of the disease. In addition, histologic grading and the presence of specific molecular markers can also be useful in establishing prognosis, as well as in determining individual treatments.
Minggu, 04 April 2010

Aloe for Cancer Prevention

Aloe for Cancer Prevention

Aloe may help prevent or aid in the regression of cancerous tumors, a new study suggests.

Researcher
s from Istanbul University in Turkey investigated the use of Aloe vera leaf pulp extract against tumor cells in mice.

In the study, the mice were divided into five groups. The first two groups were control groups, one healthy, and one that received tumor cells but did not receive aloe treatment. The test groups included one group that received aloe prior to receiving an injection of tumor cells, one received aloe with the tumor cell injection, and the last group was given aloe after receiving the tumor cell injection. The mice received aloe injections twice a week for 21 days.

The researchers measured tumor size, inflammation of different organ
s, as well as various immune cell counts to determine the effects of aloe. The best results were seen in the group that received aloe treatment prior to tumor implantation. It was noted also that aloe decreased the size of the tumors in the mice that received the aloe with the tumor implantation as well as after tumor implantation.

The research
ers also observed a decrease in the number of various tumor markers with the use of aloe in all three experimental groups. The researchers concluded that due to its capability of enhancing the immune system, Aloe vera may be a possible preventative agent for cancer.

Strong and good scientific evidence supports the use of aloe for constipation (laxative), dandruff/seborrhea (sebhorrheic dermatitis), genital herpes and psoriasis. Other integrative therapies with strong of good evidence for the prevention or treatment of cancer include vitamin A, probiotics, psychotherapy and selenium.

Bob Sims is a contribution writer for American RENA Activation Serum. RENA ACTIVATION SERUM is a powerful, all natural bio-cellular spray that you can use any time and any where. While taking this product internally, it will promote DNA activation, help your immune system response increase by 200% - 400%, and change your acidic constitution to alkaline.