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Cancer diagnostics: modern methods for detecting oncological diseases
Cancer is a word that evokes fear, but modern medicine has made significant progress in early detection and treatment of this disease. Imagine a situation: a person feels tired, periodically notes pain in a certain part of the body, but does not attach importance to it, writing it off as stress or fatigue. A few years later, the doctor diagnoses oncology at a late stage. That is why diagnosing cancer in the early stages is the key to successful treatment and recovery.
Modern research methods allow us to detect oncological processes even before the appearance of obvious symptoms. Moreover, regular preventive examinations and screening tests significantly reduce the risk of late diagnosis. How exactly can cancer be detected in time? What tests and studies give the most accurate results? Let's consider in more detail all the available methods of diagnosing oncological diseases.
When to get diagnosed with cancer
Cancer can develop without symptoms for many years. However, there are signs that may signal the need for immediate examination:
- unexplained weight loss without changes in diet
- chronic fatigue, weakness
- persistent pain that doesn't go away
- skin changes – moles, age spots, ulcers
- bleeding of unknown origin
- enlarged lymph nodes
- problems with digestion or urination
It is especially important to undergo regular diagnostics for those who have a hereditary predisposition to cancer, smoke, are exposed to chemicals, or lead a sedentary lifestyle.
Basic methods of cancer diagnosis
Depending on the location of the tumor, the doctor may prescribe one or more diagnostic methods.
Laboratory tests
Laboratory tests help assess the general condition of the body and identify abnormalities that may indicate an oncological process.
| Method | What determines | What types of cancer is it used for? |
|---|---|---|
| Complete blood count (ZAK) | Detects elevated leukocytes, decreased hemoglobin | Leukemia, bone marrow cancer |
| Biochemical blood test | Changes in liver and kidney function | Metastasis, liver cancer |
| Tumor markers | Specific proteins produced by the tumor | Prostate cancer (PSA), ovarian cancer (CA-125), colon cancer (CEA) |
| Fecal occult blood test | Blood in stools | Colorectal cancer |
| Cytological examination | Detection of cancer cells in smears, spots | Cervical, lung, breast cancer |
Visualization methods
Medical imaging methods allow us to obtain images of internal organs and detect tumors even in hidden locations.
| Method | How it works | What types of cancer is it used for? |
|---|---|---|
| Ultrasound (ultrasound) | Uses sound waves to create images of tissues | Thyroid, breast, ovarian cancer |
| Radiography | Uses X-rays | Lung cancer, bone cancer |
| Computed tomography (CT) scan | Layer-by-layer body scanning | Brain cancer, lung cancer, metastases |
| Magnetic resonance imaging (MRI) | Uses a magnetic field for detailed images | Liver, brain, spine cancer |
| PET-CT (positron emission tomography) | Detects abnormal cells based on their metabolic activity | All types of metastases, lymphomas |
Endoscopic methods
These methods allow you to examine the inside of organs and take a tissue sample for biopsy.
| Method | What is being researched? |
|---|---|
| Gastroscopy | Stomach, esophagus |
| Colonoscopy | Large intestine |
| Bronchoscopy | Bronchi, lungs |
| Cystoscopy | Bladder |
Biopsy is the main method of confirming the diagnosis
A biopsy is a procedure that involves removing a tissue sample for detailed examination under a microscope. This method can confirm or rule out the presence of a malignant tumor.
Types of biopsy:
- Fine needle biopsy – used for suspicious lesions in the thyroid gland, mammary gland.
- Trepan biopsy – allows you to obtain more tissue for research.
- Surgical biopsy – used when it is necessary to remove all or part of the tumor.
Screening: Early detection of cancer
Regular screening helps detect cancer in its early stages, when treatment is most effective.
| Screening test | For whom it is recommended |
|---|---|
| Mammography | Women over 40 years of age for breast cancer screening |
| Pap test | Women aged 21 and over for cervical cancer screening |
| Colonoscopy | People over 50 years of age for bowel cancer diagnosis |
| PSA analysis | Men over 50 for prostate cancer screening |
Cancer is not a death sentence if detected in the early stages. Early diagnosis saves lives, so you should not ignore preventive examinations and the first symptoms of the disease.
