Which bowel markers indicate cancer?

To detect intestinal cancer at an early stage, which occupies one of the leading positions among all cancers, doctors apply a study to bowel markers.

Oncomarkers are specific bodies that appear as a result of the development of malignant tumors.

It is possible to identify them in the blood and urine of a person when spreading malignant cells. What are cancer markers and how do they help detect cancer?

What are oncomarkers?

Every year, stomach and intestinal cancers affect a large number of people.

The causes of the spread of cancer pathologies of the stomach among the population are unfavorable ecology, bad habits, heredity, chronic ailments, all kinds of radiation and much more.

In addition, in recent years, more and more often cancer affects young people who have not yet reached 30 to 40 years of age.

Usually at the very beginning the cancer of the stomach and intestines does not manifest itself in any way, so most often the patients turn to the doctor when the disease has already significantly spread.

Oncologists have been trying for many years to find a way to detect pathology at the very beginning of its onset, and as a result, a method of diagnosing cancer with the help of oncomarkers appeared.

The main feature of oncomarkers is an opportunity to detect the development of oncology much earlier than traditional methods of diagnosis allow.

Thus, the patient can start treatment of this insidious and dangerous disease much earlier, thanks to which it is possible to significantly improve the condition or completely defeat the cancer of the stomach and intestines.

Markers can be detected both at the beginning of the growth of education and during the process of its decay.

Malignant particles spread through the bloodstream throughout the body, so blood is taken for analysis when a person is suspected of having cancer.

There are two types of markers that can be detected in the patient's blood:

1. are highly specific, which manifest only in certain types of cancer cells;
2. appearing in oncopathologies of very different directions.

The use of bowel cancer markers for cancer detection helps doctors solve several problems:

• to find the place where a cancerous tumor is located;
• to see the dynamics of the patient's condition during treatment, after removal of education;
• to prevent the re-development of the disease in the future;
• detect patients who are at risk and may later develop stomach cancer, as well as a thin and thick intestine.

To date, such cancers of intestines and stomach help to detect cancer:

• alpha-fetoprotein, AFP - its elevated concentration shows the presence of a tumor in the rectum and sigmoid segment. The prevalence of this marker also speaks about the stage of pathology;
• markers that signal problems with the digestive system, - CA 72-4, LASA-P;
• CA 242 is one of the main antigens that is used to detect cancer of the rectum and large intestine;
• REA is a cancer embryonic antigen, a very sensitive marker of colon cancerous growths;
• CA 19-9 is a protein that appears in tests for cancer of the rectum and thick intestine. Typically, this marker is in addition to the CA 242 and CEA markers;
• CA 125 - signals the presence of cancers in the sigmoid segment of the intestine;
• SCC is an antigen that appears in the formation of cancer in the anal canal;
• CYFRA 21-1 - manifests itself in the presence of formations in the rectum.

What do the indicators say?

It should be noted that none of these markers are completely specific, in addition, the increase in the level of markers does not always signal that an oncological process has begun in the patient's body.

Even in healthy patients, one can sometimes see a slight excess of the norm of the oncomarker. Therefore, there is an acceptable norm of indicators of markers.

A noticeable increase in the number of markers in the patient's blood is usually observed already when the malignant tumor began to actively develop in the body.

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It happens that a high level of a certain marker indicates an education that is located in a completely different place, since these markers are not specific.

That's why doctors recommend using not only oncomarkers for pathology diagnostics, but also other methods, and the final diagnosis is based only on the results of a comprehensive survey.

At the same time the blood test for oncomarkers is simply irreplaceable in the treatment of cancers.

So, with a decrease in the volume of the marker in the blood, one can speak about the effectiveness of therapy.

If the level of the marker increases, then the therapy does not work, and the doctor reviews the treatment.

Monitoring of the level of markers is very important for determining the recurrence of the disease at the earliest stages. Sometimes doctors can detect a cancerous tumor before the onset of the onset of symptoms.

People in the risk zone should be screened every 3 months. Despite the fact that the analysis is simple enough, only the attending physician can send the patient to such a survey.

How is the analysis done?

Oncomarkers are used in combination with other methods of oncology research. The marker helps to determine the location of the tumor, even if it can not be seen with X-rays and other tests.

To detect intestinal cancer, the laboratory assistant takes blood from the patient. The analysis is carried out in the morning, on an empty stomach.

The patient's last snack should be 8 hours before the procedure, and it is better that the patient's stomach rests for 12 hours.

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In addition, the patient should, on the eve of the procedure, discard juices, tea and coffee with sugar, and instead use only clean water. Blood from the patient is taken from the vein. Usually the diagnosis is received by the doctor within 24 hours.

To donate blood to cancer markers, it is necessary for someone who has had cancer previously. You need to conduct a study every 2 to 4 months, depending on how the patient's condition changes.

As a basis for the analysis, doctors take the norm of oncomarkers for a healthy person and compare the results of the study with this norm.

Deviations from the normal level of indicators indicate which areas of the intestine were affected.

For example, in normal human AFP in the blood is 0 - 10 IU / ml. Excessive excess of this indicator( up to 400 E) indicates that an oncological process has begun in the body.

In this case, the doctor suspects liver damage by metastases, which is the result of cancer of the rectum and sigmoid segment of the intestine.

The CA 242 antigen is normally between 0 and 30 IU / mL.Excess of the indicator will tell the doctor on the oncology of the intestine, pancreas and rectum before the onset of abnormal development of pathology.

The CA 19-9 marker should normally not exceed 40 IU / ml. Excessive marker indicates intestinal and rectal cancer.

This element can be found in urine, saliva, gastric juice, seminal fluid, so this test is quite low-specific and does not determine the exact position of the tumor.

The CA 72-4 cancer marker is normally 6.3 IU / mL.Excessive value of it signals about tumors of the colon, cancer of the stomach and lungs.

Diagnosis of bowel cancer markers should be supplemented by traditional studies - colonoscopy, x-ray and others. Only on the basis of all these analyzes the doctor puts the patient to the diagnosis.