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16559: Thyroglobulin, Fine Needle Aspirate Print View
Thyroglobulin, FNA     ng/mL 
Site      

PRIMARY
1 Fine Needle Aspirate 1 (0.8) mL   Refrigerated - 7 Day(s)/Room Temperature - 14 Day(s)/Frozen - 28 Day(s)  
ALTERNATE
  Saline node washing   Refrigerated - 7 Day(s)/Frozen - 28 Day(s)/Room Temperature - 14 Day(s)  

Clinically enlarged cervical lymph nodes with a history of thyroid cancer are usually assessed by fine-needle aspiration biopsy (FNAB) followed by a cytology. Thyroglobulin (Tg) is frequently elevated in malignant FNAB needle wash specimens and it's use may possibly augment or replace cytology.

A 25-gauge needle is inserted obliquely within the transducer plane
of view and moved back and forth (passes) through the nodule to
compensate for patient movement and needle deflection. There is no
suction device; cells move into the needle via capillary action. After
collection of the cytology samples, withdraw between 0.10 and 0.25
mL of saline up through each needle and empty this fluid back
through the needle into a tube. This is the needle washing used for
analysis. Repeat the passes and saline washings from the same
biopsied site and empty contents into the same tube. The washes from
all needles are pooled (final volume 1 mL). Inspect specimen for
visible blood or tissue contamination. If bloody, centrifuge
specimen and transfer supernatant to a new tube to send to the
laboratory. The supernatant, not the cellular materials, is used for
analysis. If the specimen is clear, centrifugation is not necessary.
Freeze immediately and transport frozen sample to laboratory directly.
Do not send specimens in glass tubes.
Setup Schedule
Tuesday, Thursday, Saturday

Reported (Analytical Time)
3 days

CPT Code
84432

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Notes
Other Acceptable Specimens: Thyroid-tissue washings, Non-lymph node washings, Non-nodal soft tissue washings or Cervical node washings collected in a sterile transport tube.

Reject Criteria: Glass tubes

Transport Temperature: Frozen

Methodology: Beckman Coulter Chemiluminescent






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