Types of biopsies
There are several techniques your doctor might use to take tissue or fluid samples. They range from examining your blood to extracting tissue during a procedure.
A liquid biopsy tests your blood or urine for signs of a tumor. This type of biopsy can detect cancer cells or a tumor’s DNA or RNA to help with a diagnosis or treatment planning.
Shave and punch biopsies are tests of your skin cells to check for skin conditions, like actinic keratosis or skin cancer. A shave biopsy involves using a razor blade to gently remove some of the top layer of your skin. A device can also take a small section about the size of a pencil eraser that includes deeper layers of your skin, known as a punch biopsy.
A needle biopsy involves passing a needle through the area being tested. Fine needle aspiration uses a thin needle and syringe to take tissue, cells, and fluid. A core needle biopsy uses a wider needle to collect more tissue. Sometimes doctors use a suction device to help collect enough tissue. Needle biopsies can help diagnose many medical conditions, including infections, liver disease, breast cancer, and others.
A thin, soft tube called an endoscope may be inserted through your mouth, urinary tract, or rectum to remove tissue. This type of biopsy can diagnose celiac disease, lung cancer, Crohn’s disease, and many other conditions.
When the area being biopsied is deep in your body, like your belly or pelvis, your doctor may perform a laparoscopic biopsy. Small cuts are made to allow a tube with a camera called a laparoscope to be inserted and guided to the area. Surgical instruments are passed through the tube to remove tissue. It can diagnose endometriosis, cervical cancer, chronic kidney disease, or other diseases.
Surgical biopsies require making a cut (incision) to access the tissue that needs to be removed. If your doctor is testing a tumor, bump (nodule), or lymph node, the entire structure may be removed, called an excisional biopsy. If only part of a lump, nodule, or node is removed, it’s known as an incisional biopsy. Surgical biopsies can examine tissue from many parts of your body, including your breast, muscles, lymph nodes, and other areas.
Understanding what to expect from a biopsy and the specific requirements of the procedure depends on the area of the body being tested. Penn Medicine performs every type of biopsy for thorough and precise diagnosis of diseases, infections, and illnesses.
Some of the biopsy types we perform: