Biopsy: Types of biopsy procedures used to diagnose cancer
Biopsy: Types of biopsy procedures used to diagnose cancer
A biopsy is a procedure to remove a piece of tissue or a sample of cells from your body so that it can be analyzed in a laboratory. If you're experiencing certain signs and symptoms or if your doctor has identified an area of concern, you may undergo a biopsy to determine whether you have cancer or some other condition.
While imaging tests, such as X-rays, are helpful in detecting masses or areas of abnormality, they alone can't differentiate cancerous cells from noncancerous cells. For the majority of cancers, the only way to make a definitive diagnosis is to use a biopsy to collect cells for closer examination.
Here's a look at the various types of biopsy procedures used to diagnose cancer.
Bone marrow biopsy
Your doctor may recommend a bone marrow biopsy if an abnormality is detected in your blood or if your doctor suspects cancer has traveled to your bone marrow. Bone marrow is the spongy material inside some of your larger bones where blood cells are produced. Analyzing a sample of bone marrow may reveal what's causing your blood problem.
During a bone marrow biopsy, your doctor draws a sample of bone marrow out of the back of your hipbone using a long needle. In some cases, your doctor may biopsy marrow from other bones in your body. Bone marrow biopsy is commonly used to diagnose a variety of blood problems — both noncancerous and cancerous, including blood cancers, such as leukemia, lymphoma and multiple myeloma. You receive a local anesthetic before a bone marrow biopsy in order to minimize discomfort during the procedure.
Bone marrow biopsy
In a bone marrow aspiration and biopsy, a doctor or nurse uses a thin needle to remove a small amount of liquid bone marrow, usually from a spot in the back of your hipbone called the posterior iliac ...
During endoscopy, your doctor uses a thin, flexible tube with a light on the end to see structures inside your body. Special tools are passed through the tube to take a small sample of tissue to be analyzed.
What type of endoscopic biopsy you undergo depends on where the suspicious area is located. Tubes used in an endoscopic biopsy can be inserted through your mouth, rectum, urinary tract or a small incision in your skin. Examples of endoscopic biopsy procedures include cytoscopy to collect tissue from the inside of your bladder, bronchoscopy to get tissue from inside your lung and colonoscopy to collect tissue from inside your colon.
Depending on the type of endoscopic biopsy you undergo, you may receive a sedative or anesthetic before the procedure.
An endoscopy procedure involves inserting a long, flexible tube (endoscope) down your throat and into your esophagus. A tiny camera on the end of the endoscope lets your doctor examine your esophagus,...
Cystoscopy allows your doctor to view your lower urinary tract to look for abnormalities in your urethra and bladder. Surgical tools can be passed through the cystoscope to treat certain urinary ...
During a colonoscopy, the doctor inserts a colonoscope into your rectum to check for abnormalities in your entire colon. ...
During a needle biopsy, your doctor uses a special needle to extract cells from a suspicious area. A needle biopsy is often used on tumors that your doctor can feel through your skin, such as suspicious breast lumps and enlarged lymph nodes. When combined with an imaging procedure, such as X-ray, needle biopsy can be used to collect cells from a suspicious area that can't be felt through the skin.
Needle biopsy procedures include:
You'll receive a local anesthetic to numb the area being biopsied in order to minimize the pain.
During needle biopsy, a long, thin needle is inserted through the skin and into the suspicious area. Cells are removed and analyzed to see if they are cancerous. ...
Core needle biopsy
A core needle biopsy uses a long, hollow tube to extract a core of tissue. Here, a biopsy of a suspicious breast lump is being done. The core is sent to a laboratory for testing. ...
Image-guided needle biopsy
Your doctor may use an imaging technique, such as ultrasound, during a needle biopsy procedure. Using a real-time image, your doctor can guide the needle into the best position for obtaining a sample ...
A liver biopsy is a procedure to remove a small sample of liver tissue for laboratory testing. A liver biopsy is commonly performed by inserting a thin needle through your skin and into your liver....
A skin (cutaneous) biopsy removes cells from the surface of your body. A skin biopsy is used most often to diagnose skin conditions, including cancers, such as melanoma. What type of skin biopsy you undergo will depend on the type of cancer suspected and the extent of the suspicious cells. Skin biopsy procedures include:
You receive a local anesthetic to numb the biopsy site before the procedure.
During a punch biopsy, a doctor uses a special circular blade to remove deeper layers of skin for testing. Depending on the size, stitches may be necessary to close the wound. ...
During a shave biopsy, a doctor uses a tool similar to a razor to cut through the surface of the skin. The result is a slightly indented area of your skin. Stitches usually aren't necessary after ...
During an excisional biopsy, the doctor removes an entire lump or an entire area of abnormal skin, including a portion of normal skin. You'll likely receive stitches to close the biopsy site after ...
If the cells in question can't be accessed with other biopsy procedures or if other biopsy results have been inconclusive, your doctor may recommend a surgical biopsy. During a surgical biopsy, a surgeon makes an incision in your skin to access the suspicious area of cells. Examples of surgical biopsy procedures include surgery to remove a breast lump for a possible breast cancer diagnosis and surgery to remove a lymph node for a possible lymphoma diagnosis.
Surgical biopsy procedures can be used to remove part of an abnormal area of cells (incisional biopsy). Or surgical biopsy may be used to remove an entire area of abnormal cells (excisional biopsy).
You may receive local anesthetics to numb the area of the biopsy. Some surgical biopsy procedures require general anesthetics to make you unconscious during the procedure. You may also be required to stay in the hospital for observation after the procedure.
Biopsy analysis and results
After your doctor obtains a tissue sample, it's sent to a laboratory for analysis. The sample may be chemically treated or frozen and sliced into very thin sections. The sections are placed on glass slides, stained to enhance contrast, and studied under a microscope.
The results help your doctor determine whether the cells are cancerous. If the cells are cancerous, the biopsy results can tell your doctor where the cancer originated — the type of cancer.
A biopsy also helps your doctor determine how aggressive your cancer is — the cancer's grade. The grade is sometimes expressed as a number on a scale of 1 to 4, and is determined by how cancer cells look under the microscope. Grade 1, or low-grade, cancers are generally the least aggressive and grade 4, or high-grade, cancers, generally the most aggressive. This information may help guide treatment options. Other special tests on the cancer cells also can help to guide treatment choices.
In certain cases, such as during surgery, a pathologist examines the sample of cells immediately and results are available to your surgeon within minutes. But in most cases, the results of your biopsy are available in one or two days. Some samples may need more time to be analyzed. Ask your doctor how long to expect to wait for your biopsy results.
Last Updated: 2011-03-23
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