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A needle aspiration biopsy is safer and less traumatic than an open surgical biopsy. Sometimes, surgery is needed to treat complications of a needle aspiration biopsy. But in such a case, the patient would have had to undergo a similar surgical procedure to obtain a diagnosis had the needle aspiration biopsy not been attempted. APPLICATIONS This type of biopsy is performed for one of two reasons: # A biopsy is performed on a lump or mass when its nature is in question. # For known tumors, this biopsy is performed to assess the effect of treatment or to obtain tissue for special studies. The biopsy is usually performed by a diagnostic Radiologist , a doctor with special training in performing and inter-preting X-ray procedures and in performing biopsies using x-ray guidance, with the assistance of a Cytopathologist . PREPARATION During this procedure, a very thin needle is used to remove cells or other material from a Tumor or mass detected in the body. These cells will then be given to the cytopathologist, who will attempt to make a diagnosis. There may be times when a diagnosis cannot be made; not all cells removed during a needle aspiration biopsy can be identified with certainty. Several preparations are necessary before this procedure.
Before the procedure is started, vital signs ( Pulse , Blood Pressure , Temperature , etc.) are taken. Then, depending on the nature of the biopsy, an Intravenous Line (I.V.) may be placed. Very Anxious patients may want to be given sedation through this line. For patients with less anxiety, oral medication ( Valium ) can be prescribed to take before the procedure. PROCEDURE The Skin above the area to be biopsied is swabbed with an Antiseptic solution and draped with sterile Surgical Towel s. The skin, underlying Fat , and Muscle is then be numbed with a Local Anesthetic . After locating the mass for biopsy, using x-rays or Palpation , a special needle of very fine diameter is passed through into the mass. The needle may be inserted and withdrawn several times. There are many reasons for this:
After the needles are placed into the mass, cells are withdrawn by aspiration with a Syringe and placed into a special container. The patient's vital signs are taken again, and the patient is removed to an observation area for about 3 to 5 hours. POST-OPERATIVE CARE AND COMPLICATIONS As with any surgical procedure, complications are possible. Fortunately, major complications due to thin needle aspiration biopsies are fairly uncommon, and when complications do occur, they are generally mild. The kind and severity of complications depend on the organs from which a biopsy is taken or the organs gone through to obtain cells. After the procedure, mild analgesics are used to control post-operative pain. Aspirin or aspirin substitutes should not be taken for 48 hours after the procedure (unless aspirin is prescribed for a cardiac or neurological condition). Since sterility is maintained throughout the procedure, Infection is rare. But should an infection occur, it will be treated with Antibiotics . Bleeding is the most common complication of this procedure. A slight bruise may also appear. If a Lung or Kidney biopsy has been performed, it is very common to see a small amount of blood in Sputum or Urine after the procedure. Only a small amount of bleeding should occur. During the observation period after the procedure, bleeding should decrease over time. If more bleeding occurs, this will be monitored until it subsides. Rarely, major surgery will be necessary to stop the bleeding. Other complications depend upon the body part on which the biopsy takes place:
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