Thyroid

Auto text: “Insert Thyroid Diffuse” or “Insert Thyroid Nodule”

Triage:

  • Weigh
  • Measure right lobe, left lobe, isthmus in 3 dimensions
  • Ink outer surface:
  • If the specimen is a lobectomy or hemithyroidecomy (lobe + isthmus): ink the outer surface of the lobe and isthmus one color (blue or black), ink the CUT surface of the lower lobe / isthmus orange – the reason is to tell the difference between the peripheral margin (in continuity with the soft tissue) and the thyroid margin (in continuity with the other lobe of thyroid gland). Do NOT ink the outer “capsular” surface of the isthmus orange.
  • Please do this for ALL lobectomies, hemithyroidectomies, completion thyroidectomies, regardless of whether the opposite lobe is resected during the same procedure or not:
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  • If the specimen is an intact total thyroidectomy with an appreciable isthmus: ink left black, right blue, isthmus orange.
  • If there is no appreciable isthmus, you can ink left black and right blue:
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  • Fix in formalin overnight (Fix ALL thyroids! This procedure may help eliminate artifactual nuclear atypia.)

Gross:

  • Check ultrasound and FNA reports for number/location of nodules and cytologic diagnoses. This clinical information will help guide your dissection.
  • How to serially section:
  • If the specimen is a lobectomy or hemithyroidecomy (lobe + isthmus): Each lobe should be serially sectioned transversely from superior to inferior (i.e. perpendicular to the long axis). Include isthmic orange margins in your transverse sections.
  • If the specimen is an intact total thyroidectomy with an appreciable isthmus, the lobes should be sectioned transversely and the isthmus should be sectioned sagittally (from right to left or vice versa).
  • If the specimen is an intact total thyroidectomy and the isthmus is short/inconspicious, the lobes should be sectioned transversely, and isthmus can be included in your right and left lobe sections.
  • Document location and size of nodules.
  • For thyroids with 1) no nodules or 2) multiple coalescent nodules without a dominant or clinically suspicious nodule:
    • Submit one cassette each of: right upper, right mid, right lower, left upper, left mid, left lower, isthmus
    • You can put 1-2 sections in each cassette
    • Submit all candidate lymph nodes and parathyroids
  • For thyroids with 1) single dominant nodule or 2) multiple clinically suspicious nodules:
    • If lesion is grossly infiltrative or has an undulating or ill-defined edge: Submit representative sections, ~ 1 per cm, including nearest margin and interface with normal.
    • If lesion is well-circumscribed (encapsulated or unencapsulated): Submit representative full sections of tumor AND a few additional cassettes of the interface with normal (multiple strips per cassette). If you think the lesion may have a CAPSULE, photograph a representative cross section. You do not necessarily need to submit the entire periphery of the lesion up front. If we determine histologically that there is a true capsule, we can always submit more.
    • Document in your gross description whether extrathyroidal extension into fat, skeletal muscle, or other anatomic landmarks is visible.
    • Submit other suspicious/discrete lesions
    • Submit representative uninvolved normal, documenting location in your cassette summary: RUL, RML, RLL, LUL, LML, LLL, Isthmus
    • Submit all candidate lymph nodes and parathyroids
  • For Medullary Carcinoma or MEN syndrome patients:
    • If the patient is undergoing prophylactic thyroidectomy for MEN syndrome, submit the entire thyroid sequentially.
    • If the patient already has known medullary carcinoma, submit at least one extra cassette each of bilateral upper-mid poles (to assess for C-cell hyperplasia).
    • You can put 1-2 sections in each cassette.

Updated 2-14-19 NAC.

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