What is a biopsY?
Biopsies are often used to determine if a patient has extramammary Paget's disease (EMPD). A biopsy is a sample of tissue taken from a patient so that a pathologist can examine it to determine whether EMPD is present.
There are many different types of biopsies but the most common types used in EMPD diagnosis are the punch or shave biopsies. Other biopsies include the surface or wedge biopsies.
A doctor will use local anesthetic to anesthetize an area before a biopsy is preformed. This is generally done with a very small needle and typically the patient feels a small pinch. The patient is awake during the procedure, which takes just a few minutes per biopsy.
With a punch biopsy the doctor will use an instrument that punches a small hole through the top layers of the skin to remove a tissue sample. With a shave biopsy the doctor will shave a few layers of skin. Sometimes a stitch or two is needed after a punch biopsy.
A surface biopsy is performed by gently scraping cells from the surface of the skin. A wedge biopsy invloves the use of a scalpel, removing a small wedge of tissue for testing.
Depending on the location and type of biopsy, it often takes a few weeks to a few months for a biopsy to totally heal.
If a biopsy determines a patient has EMPD, additional mapping or scouting biopsies are frequently used to help establish the extent of the EMPD.
If numerous biopsies are needed the doctor may choose to perform the biopsy procedures using minimal or moderate general sedation. With this technique, often referred to as twilight anesthesia, a small dose of general anesthesia is used. The patient is sedated, but not unconscious, which means that much of the biopsy process is forgotten by the patient. Under this approach the patient is awakened quickly and goes home rapidly.
In vivo reflectance confocal microscopy (RCM) is a non-invasive imaging procedure that allows real-time viewing of tissue, resulting in virtual biopsies. With this procedure no tissue is removed as a pathologist reviews the suspected EMPD area in real-time.