Yale New Haven Hospital

Department of Laboratory Medicine
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Thyroglobulin, fine needle aspirate

Lab Section: 

Sendout Reference


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Test ID: 








12 days

Specimen Requirements: 

Collection: 3.0 mL Blood in a Sterile Container.
Pediatric volume: 1 mL.
A 25-gauge needle is inserted obliquely within the transducer plane of view and moved back and forth through the nodule to compensate for patient movement and needle deflection. There is no suction device; cells move into the needle via capillary action. Three to six separate passes are performed, each with a new needle. After collection of the cytology samples, each FNA needle is then washed with 0.1-0.5 mL of normal saline; the washes from all needles are pooled (final volume 1 mL) and immediately frozen,
Transport: Frozen.
Unacceptable conditions: Glass tubes
Stability: Room Temperature: 7 days; Refrigerated: 7 days; Frozen: 28 days



Clinical Indications: 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.

Performing laboratory: Quest Diagnostics Nichols Institute-San Juan Capistrano, CA 33608 Ortega Highway San Juan Capistrano, CA 92675-2042

Reference Interval: 

See patient report or consult reference laboratory website.


CPT Code(s): 


Last Changed: 

8/16/2017 5:35:58

Last Reviewed: 

8/16/2017 5:35:58