Thyroid nodule surgery

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Surgery

Partially cystic nodules that repeatedly yield nondiagnostic aspirates need close observation or surgical excision. Surgery should be more strongly considered if the cytologically nondiagnostic nodule is solid.

If a cytology result is diagnostic of or suspicious for PTC, surgery is recommended 65

For those patients with subsequent recurrent symptomatic cystic fluid accumulation, surgical removal, generally by hemithyroidectomy, or percutaneous ethanol injection (PEI) are both reasonable strategies

Recurrent cystic thyroid nodules with benign cytology should be considered for surgical removal or PEI based on compressive symptoms and cosmetic concerns.

Bennedbaek FN, Hegedu¨ s L 2003 Treatment of recurrent thyroid cysts with ethanol: a randomized double-blind controlled trial. J Clin Endocrinol Metab 88:5773–5777. 91. Valcavi R, Frasoldati A 2004 Ultrasound-guided percutaneous ethanol injection therapy in thyroid cystic nodules. Endocr Pract 10:269–275

for patients with nodules diagnosed as differentiated thyroid carcinoma (DTC) by FNA during pregnancy, delaying surgery until after delivery does not affect outcome

Moosa M, Mazzaferri EL 1997 Outcome of differentiated thyroid cancer diagnosed in pregnant women. J Clin Endocrinol Metab 82:2862–2866.

A nodule with cytology indicating PTC discovered early in pregnancy should be monitored sonographically and if it grows substantially (as defined above) by 24 weeks gestation, surgery should be performed at that point. However, if it remains stable by midgestation or if it is diagnosed in the second half of pregnancy, surgery may be performed after delivery. In patients with more advanced disease, surgery in the second trimester is reasonable

The goals of thyroid surgery can include provision of a diagnosis after a nondiagnostic or indeterminate biopsy, removal of the thyroid cancer, staging, and preparation for radioactive ablation and serum Tg monitoring

Table

summary recommendation:

For patients with thyroid cancer >1 cm, the initial surgical procedure should be a near-total or total thyroidectomy unless there are contraindications to this surgery. Thyroid lobectomy alone may be sufficient treatment for small (<1 cm), low-risk, unifocal, intrathyroidal papillary carcinomas in the absence of prior head and neck irradiation or radiologically or clinically involved cervical nodal metastases

indeterminate thyroid nodules and DTC	Surgical options to address the primary tumor should be limited to hemithyroidectomy with or without isthmusectomy, near-total thyroidectomy (removal of all grossly visible thyroid tissue, leaving only a small amount [<1 g] of tissue adjacent to the recurrent laryngeal nerve near the ligament of Berry), and total thyroidectomy (removal of all grossly visible thyroid tissue). Subtotal thyroidectomy, leaving >1 g of tissue with the posterior capsule on the uninvolved side, is an inappropriate operation for thyroid cancer Duren M, Yavuz N, Bukey Y, Ozyegin MA, Gundogdu S, Ac¸bay O, Hatemi H, Uslu I, Onsel C, Aksoy F, Oz F, Unal G, Duren E 2000 Impact of initial surgical treatment on survival of patients with differentiated thyroid cancer: experience of an endocrine surgery center in an iodinedeficient region. World J Surg 24:1290–1294
nondiagnostic biopsy, a biopsy suspicious for papillary cancer or suggestive of ‘‘follicular neoplasm’’	For patients with an isolated indeterminate solitary nodule who prefer a more limited surgical procedure, thyroid lobectomy is the recommended initial surgical approach total thyroidectomy is indicated in patients with indeterminate nodules who have large tumors (>4 cm), when marked atypia is seen on biopsy, when the biopsy reading is ‘‘suspicious for papillary carcinoma,’’ in patients with a family history of thyroid carcinoma, and in patients with a history of radiation exposure Patients with indeterminate nodules who have bilateral nodular disease, or those who prefer to undergo bilateral thyroidectomy to avoid the possibility of requiring a future surgery on the contralateral lobe, should also undergo total or near-total thyroidectomy
Surgery for a biopsy diagnostic for malignancy	Neartotal or total thyroidectomy is recommended if the primary thyroid carcinoma is >1 cm (156), there are contralateral thyroid nodules present or regional or distant metastases are present, the patient has a personal history of radiation therapy to the head and neck, or the patient has first-degree family history of DTC. Older age (>45 years) may also be a criterion for recommending near-total or total thyroidectomy even with tumors <1–1.5 cm, because of higher recurrence rates in this age group Hay ID, Thompson GB, Grant CS, Bergstralh EJ, Dvorak CE, Gorman CA, Maurer MS, McIver B, Mullan BP, Oberg AL, Powell CC, van Heerden JA, Goellner JR 2002 Papillary thyroid carcinoma managed at the Mayo Clinic during six decades (1940–1999): temporal trends in initial therapy and long-term outcome in 2444 consecutively treated patients. World J Surg 26:879–885. 123. Lin JD, Chao TC, Huang MJ, Weng HF, Tzen KY 1998 Use of radioactive iodine for thyroid remnant ablation in welldifferentiated thyroid carcinoma to replace thyroid reoperation. Am J Clin Oncol 21:77–81 Rubino C, de Vathaire F, Dottorini ME, Hall P, Schvartz C, Couette JE, Dondon MG, Abbas MT, Langlois C, Schlumberger M 2003 Second primary malignancies in thyroid cancer patients. Br J Cancer 89:1638–1644
central-compartment (level VI) neck dissection	Therapeutic central-compartment (level VI) neck dissection: For patients with clinically involved central or lateral neck lymph nodes should accompany total thyroidectomy to provide clearance of disease from the central neck. Prophylactic central-compartment neck dissection (ipsilateral or bilateral): Consider in patients with papillary thyroid carcinoma with clinically uninvolved central neck lymph nodes, especially for advanced primary tumors (T3 or T4) Near-total or total thyroidectomy without prophylactic central neck dissection: Consider in small (T1 or T2), noninvasive, clinically node-negative PTCs and most follicular cancer
lateral neck compartmental lymph node dissection	For patients with biopsyproven metastatic lateral cervical lymphadenopathy. Recommendation rating
Completion thyroidectomy	should be offered to those patients for whom a near-total or total thyroidectomy would have been recommended had the diagnosis been available before the initial surgery. This includes all patients with thyroid cancer except those with small (<1 cm), unifocal, intrathyroidal, node-negative, low-risk tumors

Increased extent of primary surgery may improve survival for high-risk patients and low-risk patients

Mazzaferri EL, Young RL 1981 Papillary thyroid carcinoma: a 10 year follow-up report of the impact of therapy in 576 patients. Am J Med 70:511–518. 159.

DeGroot LJ, Kaplan EL, McCormick M, Straus FH 1990 Natural history, treatment, and course of papillary thyroid carcinoma. J Clin Endocrinol Metab 71:414–424. 160.

Samaan NA, Schultz PN, Hickey RC, Goepfert H, Haynie TP, Johnston DA, Ordonez NG 1992 The results of various modalities of treatment of well differentiated thyroid carcinomas: a retrospective review of 1599 patients. J Clin Endocrinol Metab 75:714–720