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Zorluk: ZorBreast and Endocrine Surgery

Match each patient presentation involving a thyroid nodule or mass with the most appropriate surgical management or next step in intervention.

  • A 45-year-old woman with a 5-cm solid thyroid nodule. Fine-needle aspiration biopsy reveals papillary thyroid carcinoma. Ultrasound shows no suspicious cervical lymph nodes.Total thyroidectomy without prophylactic central lymph node dissection
  • A 35-year-old woman with a 2.5-cm thyroid nodule. Fine-needle aspiration biopsy reveals a follicular neoplasm. Serum thyroid-stimulating hormone is normal.Diagnostic thyroid lobectomy
  • A 50-year-old man with a 2-cm thyroid nodule. Fine-needle aspiration biopsy is suspicious for malignancy. Fasting serum calcitonin levels are markedly elevated.Total thyroidectomy with prophylactic central compartment lymph node dissection
  • A 75-year-old man with a 6-cm rapidly enlarging, fixed, hard thyroid mass and new-onset hoarseness. Fine-needle aspiration biopsy reveals anaplastic thyroid carcinoma.Prompt airway evaluation and consideration of palliative therapies

Cevap

The presentations match as follows: The 5-cm papillary carcinoma requires total thyroidectomy without prophylactic central dissection. The follicular neoplasm requires a diagnostic thyroid lobectomy. The medullary carcinoma (high calcitonin) requires total thyroidectomy with prophylactic central compartment dissection. The anaplastic carcinoma requires prompt airway evaluation and palliation.
Each surgical strategy is carefully selected based on the biologic behavior and diagnostic requirements of the respective thyroid pathology. Papillary carcinoma greater than 4 cm requires a total thyroidectomy, but no prophylactic neck dissection if nodes are clinically negative. Follicular neoplasms require lobectomy for histologic assessment of invasion. Medullary carcinoma requires prophylactic central neck dissection due to high rates of micrometastases. Anaplastic carcinoma requires airway management and palliation due to its aggressive nature and typical unresectability at presentation.

Adım Adım Çözüm

1
Evaluate the indication for total thyroidectomy in papillary thyroid carcinoma.
The nodule in the first presentation is 5 cm, which is greater than the 4 cm threshold, warranting total thyroidectomy. Since ultrasound is negative for lymphadenopathy, prophylactic central neck dissection is omitted.
Tumor size and nodal status dictate the extent of initial surgery for well-differentiated thyroid cancers.
2
Determine the management of a follicular neoplasm.
The second presentation shows a follicular neoplasm. Cytology cannot differentiate between a follicular adenoma and carcinoma, necessitating a diagnostic lobectomy to evaluate for capsular or vascular invasion.
Histopathologic architecture is required to definitively diagnose follicular thyroid carcinoma.
3
Identify the standard surgical approach for medullary thyroid carcinoma.
The third presentation is highly suspicious for medullary thyroid carcinoma given the elevated calcitonin. This requires a total thyroidectomy with a prophylactic central compartment lymph node dissection.
Medullary thyroid carcinoma has a high propensity for early nodal metastasis, making prophylactic central dissection standard.
4
Formulate a plan for anaplastic thyroid carcinoma.
The fourth presentation describes anaplastic thyroid carcinoma with local invasion (hoarseness indicates recurrent laryngeal nerve involvement). The most appropriate approach focuses on airway security and palliation rather than curative resection.
Anaplastic carcinoma is rapidly fatal and rarely amenable to curative surgery; quality of life and airway patency are primary concerns.

Anahtar Kavram

The surgical management of thyroid nodules depends on the specific cytologic diagnosis, tumor size, and biochemical markers. Distinctions include diagnostic lobectomy for follicular neoplasms, prophylactic central node dissection for medullary carcinoma but not node-negative papillary carcinoma, and palliation for anaplastic carcinoma.
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