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The Daily Insight

How do you make FNA slides

Author

Robert Spencer

Published Mar 31, 2026

Place the needle and syringe into the CytoLyt® needle rinse tube or RPMI and draw in some fluid. Quickly separate the two slides like opening a book. The result will be a mirror-image of the specimen on each slide. Immediately fix one slide in 95% ETOH (ethanol; the green-top slide holder).

How do you prepare for an FNA?

There is no one standard preparation before fine needle aspiration. You may be asked to take these preparations: Changes in medicines. Several days before the test, stop taking aspirin or other blood thinners.

How do you prepare thyroid FNA slides?

Gently press down on the first slide until the slides feel stuck together. Quickly separate the two slides in one motion by pulling the second slide straight up. The result will be a mirror image of the specimen on each slide. Quickly drop one of the slides into fixative and allow the other to completely air dry.

Which stain is used for FNAC?

Routinely various stains like Haematoxylin and Eosin (H&E), Romanowsky and Pap have been used for staining the FNAC smears. Romanowsky stains are routinely used for staining the blood films and air dried cytological smears [2].

How do you make a fluid slide?

  1. Place a drop of fluid in the center of the slide.
  2. Position sample on liquid, using tweezers.
  3. At an angle, place one side of the cover slip against the slide making contact with outer edge of the liquid drop.
  4. Lower the cover slowly, avoiding air bubbles.
  5. Remove excess water with the paper towel.

What is FNA test?

If other tests show you might have breast cancer, your doctor may refer you for a fine needle aspiration (FNA) biopsy. During this procedure, a small amount of breast tissue or fluid is taken from the suspicious area and is checked for cancer cells.

What is the principle of aspiration process?

The superficial fine-needle aspiration (FNA) procedure involves using a fine-gauge needle to extract cells from a palpable mass or nodule. The most common anatomic sites for superficial FNAs include thyroid, breast, lymph node, salivary glands, and subcutaneous soft tissue.

What color is fluid from a breast cyst?

Occasionally during this procedure, fluid may be withdrawn from a breast mass. This fluid can range in color from light yellow to dark green. It may be clear or cloudy. These are all normal color variations of benign cyst fluid.

What happens after fine needle aspiration?

After most fine needle aspiration biopsy procedures, you can drive yourself home and go back to your normal activities right away. Sometimes, the biopsy site may feel sore. In rare cases, infection or bleeding can occur.

What happens if FNAC test is positive?

All masses in irradiated necks are subjected to FNAC assessment initially. When FNAC shows a positive finding, treatment should be given accordingly as FNAC has a high PPV. However, when FNAC shows a negative result, malignancy cannot be reliably ruled out since the NPV of FNAC is low (37%).

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Can a core needle biopsy be wrong?

The currently used biopsy systems allow for a precise identification of the site of material sampling. Unfortunately, core needle biopsy carries also a risk of false-negative results.

How do you make FNAC slides?

  1. Following the FNA, gently remove the needle from the syringe while holding the needle above the slide in case of accidental spillage of the specimen.
  2. Draw air into the syringe and replace the needle onto the syringe.
  3. Squirt only 1 – 2 drops to the center of one of the labeled slides.

How do you make a FNAC test?

The needle may have a syringe attached during FNAC biopsies. When a syringe is used, suction is applied to allow more material to be obtained. The needle is inserted and drawn in and out for a period of about five seconds and then withdrawn. The material is then smeared on a glass slide.

What is the needle thickness used in FNAC?

Concerning the needle size for thyroid fine needle aspiration cytology (FNAC), 25-27-gauge needles are generally used in Western countries. However, in Japan, the use of larger needles (21-22-gauge needles) is common. The aim of our study was to determine the optimal needle size for thyroid FNAC.

What is procedure code 88172?

CPT codes 88172 and 88177 are professional cytology billing codes that are used for rapid assessment of fine-needle aspiration (FNA) samples.

What cytology is used for?

Cytology is the exam of a single cell type, as often found in fluid specimens. It’s mainly used to diagnose or screen for cancer. It’s also used to screen for fetal abnormalities, for pap smears, to diagnose infectious organisms, and in other screening and diagnostic areas.

What is the full form of FNAC?

Procedure: FNAC (fine needle aspiration cytology)

Who should perform FNA?

FNA needle biopsy can usually be done in your doctor’s office or clinic. Almost always by an endocrinologist or a radiologist with expertise in FNA biopsy. Before the FNA biopsy, local anesthesia (numbing medicine) is injected into the skin over the thyroid nodule.

What is FNA thyroid?

A thyroid fine needle aspiration biopsy is a procedure that removes a small sample of tissue from your thyroid gland. Cells are removed through a small, hollow needle. The sample is sent to the lab for analysis. The thyroid gland is in the front of your neck.

What size needle is used for fine needle aspiration?

The needle used is a thin, fine-gauge needle that is smaller in diameter than the needle used in most blood draws (usually a 25 or 27 gauge 1.5 inch needle). The aspiration may be done with a needle or with a needle that is attached to a syringe.

Does FNA hurt?

Fine needle aspiration is a relatively non-invasive, less painful and quicker method when compared to other methods of tissue sampling such as surgical biopsy. A cyst aspiration can also be achieved with a FNA, where the fluid is drained from a cyst with no need for analysis.

Why is my breast hard after biopsy?

Sometimes a lump can form if an area of the fatty breast tissue is damaged. This is called fat necrosis (necrosis is a medical term used to describe damaged or dead tissue). Damage to the fatty tissue can occur following a breast biopsy, radiotherapy to the breast or any breast surgery, including: breast reconstruction.

How accurate is fine needle aspiration?

Fine-needle aspiration biopsy (FNAB) is an efficient and reliable means for the evaluation of thyroid nodules, and it has been shown to have a diagnostic sensitivity of 89% to 98% and a specificity of 92%.

How much does a fine needle aspiration cost?

Fine needle aspiration is typically an outpatient procedure. The cost of fine-needle aspiration can vary between 400 USD to 1600 USD or more, depending on the hospital and surgeon. The cost may go up if ultrasound guidance is used. One may check with their insurance company to check if the plan covers the costs.

How do you prepare for a biopsy?

  1. Drive you home.
  2. Stay with you for 24 hours.
  3. Help with household chores for a day or two.

What vitamin is good for breast cyst?

One of the suggested treatments for breast cyst is vitamin B6 intake.

Can aspirated breast cysts refill?

Cysts can come back after aspiration, or new cysts can develop in the nearby breast tissue. Cysts that come back following aspiration usually take several months to refill, and one that comes back within a few weeks may need more testing.

Can a complex breast cyst be aspirated?

A complex cyst is sometimes aspirated, or drained with a fine needle, so that the fluid inside can be tested. If blood or any unusual cells are present, further testing may be needed to rule out breast cancer.

Can FNAC go wrong?

Nevertheless, like any other test, FNAC has its limitations and diagnostic pitfalls. These limitations include false negative and false positive results and a proportion of FNA results that are not obviously benign or malignant and fall into the indeterminate or suspicious group [5].

What is difference between FNAC and biopsy?

The sampling and biopsy considered together are called fine-needle aspiration biopsy (FNAB) or fine-needle aspiration cytology (FNAC) (the latter to emphasize that any aspiration biopsy involves cytopathology, not histopathology). Fine-needle aspiration biopsies are very safe minor surgical procedures.

Can FNAC detect lymphoma?

Although histopathological examination is considered to be gold standard in diagnosis especially in lymphomas, FNAC maybe the only tool for diagnosis and further management of the patients in some cases of metastatic malignancy.