An ultrasound-guided needle biopsy refers to a diagnostic test during which a doctor removes a small amount of tissue, using an ultrasound for visual guidance. Doctors then evaluate the tissue sample to determine whether it is cancerous or benign. Doctors perform ultrasound-guided needle biopsies to check breast lumps, thyroid nodules and other abnormal growths.
Features
Ultrasound-guided needle biopsies use a fine-gauge needle and syringe, an automated core needle or a needle powered by vacuum pressure to collect fluid and tissue. During the procedure, the radiologist uses an ultrasound machine, which creates images through sound waves, to help her place the needle in the correct location.
Considerations
Ultrasound-guided needle biopsies are less invasive than surgical biopsies, do not use ionizing radiation and have a short patient recovery time. However, it can be difficult to biopsy very small lesions, and ultrasound-guided needle biopsies may occasionally underestimate the severity of the disease.
Preparation
Stop taking aspirin, medications containing aspirin and herbal medicines a week before an ultrasound-guided needle biopsy, because these medicines interfere with blood clotting. Stop taking anti-inflammatory medications three days before an ultrasound-guided needle biopsy. Depending on the procedure, you may need to stop eating after midnight the night before your surgery.
Procedure
Doctors numb the area with a local anesthetic before performing the biopsy. Doctors may also insert an intravenous needle in your arm. Most ultrasound-guided needle biopsies are performed on an outpatient basis, so you won't need to stay the night at the hospital. However, you may need to ask a friend to drive you home.
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