How does an oncologist diagnose cancer?

Doctors will usually use a combination of tests to determine whether a person has cancer. According to Oncology journal the tests show the presence of cancerous cells in the body and the extent to which these cells have spread. 

Diagnostics plays a vital role throughout each patient’s cancer journey—before, during and after treatment. During treatment, they track the size of the tumour, the disease’s progress and your response to treatment, and change your treatment as needed.

Under some circumstances, minimally invasive tools like navigational bronchoscopy and endoscopic ultrasound enable us to locate and reach tiny tumours without the need for surgery.

After treatment, it helps you to prevent, identify and control the side effects of the disease and its treatment, and it schedules regular check-ups to monitor for signs of metastasis or recurrence.

Some Of These Tests Include:

Biopsy: This includes taking a sample of tissue from a potentially cancerous lesion and sending it to a laboratory. A pathologist who specializes in diagnostic procedures will then examine the cells for signs of cancer.

A biopsy sometimes includes using a needle to remove cells, but a doctor might use a surgical procedure in situations where a larger area requires examination.

Imaging scans: These support a doctor identify cancerous lesions in the body. Examples of imaging studies involve a CT, ultrasound, or MRI scan. Imaging machines have various methods of creating images and may be more sensitive to certain kinds of cancer, such as cancers of the soft tissue or bones. A doctor may request more than one imaging scan for this reason.

Laboratory testing: Cancerous cells deliver compounds into the blood. A doctor may take samples of blood, sputum, urine, or other body fluids to check for these compounds. Lab tests are infrequently a primary method for diagnosing cancer. 

However, they can be necessary for managing out other conditions and confirming a diagnosis. A doctor will generally work with a organisation of specialists to diagnose cancer, including a radiologist and pathologist.


Doctors classify cancer utilising the site at which cancer started or the kind of tissue where cancer originated.

For example, a person who has breast cancer, which is usually a type of carcinoma, or cancer that arises from epithelial tissue. This is a kind of tissue that forms a specific layer of the skin.

Some Of The cancer classifications by tissue type include:

Carcinoma: This occurs in epithelial tissues, such as those in the gastrointestinal tract or mucous membranes. According to the National Cancer Institute, an expected 80 to 90 per cent of cancer cases are carcinomas.

Leukaemia: This is cancer that develops in the bone marrow, which produces blood cells.

Lymphoma: This occurs in the lymphatic system that includes the spleen, tonsils, and thymus. This system links to immune activity and hormones.

Mixed types: Mixed cancers grow in two different types of cell from one category or multiple categories.

Myeloma: Often arises in the bone marrow, this type originates in plasma cells that circulate as part of the blood.

Sarcoma: These found in connective tissue, developing in areas such as the bones,  fat, muscle, and cartilage. Sarcomas are more common in young people.

Oncoviruses (viruses that can cause cancer) involve  Epstein–Barr virus (B-cell lymphoproliferative disease also nasopharyngeal carcinoma), human papillomavirus (cervical cancer), Kaposi’s sarcoma herpesvirus (Kaposi’s sarcoma also primary effusion lymphomas). To know about this topic you can visit Virology journal.

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