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punch biopsy

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A procedure in which a small round piece of tissue about the size of a pencil eraser is removed using a sharp, hollow, circular instrument. The tissue is then checked under a microscope for signs of disease. A punch biopsy may be used to check for certain types of cancer, including skin, vulvar, and cervical cancer. It may also be used to check for certain skin conditions and changes that may lead to cancer.
Punch biopsy; drawing shows a sharp, hollow, circular instrument being inserted into a lesion on the skin of a patient’s forearm. The instrument is turned clockwise and counterclockwise to cut into the skin and remove a small, round piece of tissue. A pullout shows that the instrument cuts about 4 millimeters (mm) down to the layer of fatty tissue below the skin.Enlarge this image in new window
Punch biopsy. A sharp, hollow, circular instrument is used to remove a small, round piece of tissue from a lesion on the skin. The instrument is turned clockwise and counterclockwise to cut about 4 millimeters (mm) down to the layer of fatty tissue below the skin and remove the sample of tissue. Skin thickness is different on different parts of the body.
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