Papillary thyroid cancer
ICD-10 C73 · ICD-11 2D10.1

Surgical Treatment of Papillary Thyroid Carcinoma >4 cm (cT3a), Extrathyroidal Extension (cT3b/cT4), or Metastatic Disease (cN1 / cM1)

This protocol addresses papillary thyroid carcinoma presenting with features that warrant a more extensive initial surgical approach: primary tumors exceeding 4 cm (cT3a), any-size tumors with gross extrathyroidal extension (cT3b or cT4), clinically apparent regional lymph node involvement (cN1), or distant metastasis (cM1).

Clinical scenario

Patients in this group include those with a primary tumor classified as cT3a (>4 cm, confined to the thyroid), cT3b or cT4 (gross extension beyond the thyroid capsule regardless of tumor size), clinically positive central or lateral cervical lymph nodes (cN1a or cN1b), or confirmed distant metastatic disease (cM1). Each of these features places the patient outside the low-risk surgical category and drives the scope of initial operative management.

Surgical approach

Initial management involves total thyroidectomy with gross removal of all primary tumor. Neck dissection is indicated when nodal disease is clinically apparent, with the specific compartments addressed determined by the location and extent of involved nodes. The complete protocol specifies the dissection levels, clinical criteria for each compartment, and conditions under which the approach may be modified.

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References

  1. For patients with thyroid cancer >4 cm (cT3a), cancer of any size with gross extra-thyroidal extension (cT3b or cT4), or clinically apparent metastatic disease to lymph nodes (cN1) or distant sites (cM1), the initial surgical procedure should include a total thyroidectomy with gross removal of all primary tumor and node dissection unless there are contraindications to this procedure.
  2. Therapeutic central-compartment (Level VI and upper Level VII) neck dissection for patients with clinically involved central nodes (cN1a) should accompany thyroidectomy to clear disease from the central neck.
  3. Therapeutic lateral neck compartmental lymph node dissection, typically including Levels IIa, III, IV and Vb, should be performed as part of initial surgical therapy for patients with biopsy-proven or clinically obvious metastatic lateral compartment cervical lymphadenopathy. DOI: 10.1177/10507256251363120
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