Question

Difficulty: MediumBreast and Endocrine Surgery

Match each clinical presentation of an endocrine lesion with its most appropriate diagnostic or surgical management step.

  • A 45-year-old woman with a 2-cm thyroid nodule, decreased TSH, elevated free T4, and increased uptake on a radionuclide scan.Surgical resection or radioactive iodine ablation without the need for fine-needle aspiration.
  • A 55-year-old man with a 1.5-cm thyroid nodule, normal TSH, and fine-needle aspiration demonstrating intranuclear inclusions and grooved nuclei.Thyroid lobectomy or total thyroidectomy depending on patient factors.
  • A 60-year-old woman with asymptomatic hypercalcemia of 11.2 mg/dL, elevated intact parathyroid hormone, and a 24-hour urine calcium of 350 mg.Preoperative localization imaging followed by minimally invasive surgical resection.
  • A 40-year-old man with an incidentally discovered 5-cm adrenal mass and significantly elevated 24-hour urine fractionated metanephrines.Preoperative alpha-adrenergic blockade for 10-14 days followed by surgical resection.

Answer

The correct matches align each specific endocrine pathology (toxic adenoma, papillary thyroid carcinoma, primary hyperparathyroidism, and pheochromocytoma) with its standard diagnostic and perioperative surgical management.
Each matching pair appropriately links the clinical endocrine pathology with the standard of care. Toxic adenomas do not require FNA and are managed definitively. Papillary thyroid carcinomas require surgical excision. Primary hyperparathyroidism is treated with parathyroidectomy after localization. Pheochromocytomas require mandatory alpha-blockade to prevent life-threatening intraoperative hemodynamic instability.

Step-by-Step Solution

1
Evaluate the patient with a low TSH, high T4, and a 'hot' nodule on radionuclide scan.
Identify the lesion as a toxic adenoma.
Hyperfunctioning nodules have a very low risk of malignancy, so fine-needle aspiration is bypassed in favor of definitive therapy (surgery or radioactive iodine).
2
Analyze the cytology findings of intranuclear inclusions and grooved nuclei in a euthyroid patient with a nodule.
Diagnose papillary thyroid carcinoma.
These are classic histologic features requiring surgical resection via lobectomy or total thyroidectomy.
3
Interpret the laboratory panel showing hypercalcemia, elevated PTH, and high 24-hour urine calcium.
Confirm the diagnosis of primary hyperparathyroidism.
Elevated urine calcium distinguishes this from familial hypocalciuric hypercalcemia, indicating that surgical removal of the hyperfunctioning gland is appropriate.
4
Assess the adrenal mass presenting with elevated fractionated metanephrines.
Identify the tumor as a pheochromocytoma.
Medical preparation with alpha-blockade (e.g., phenoxybenzamine) is mandatory prior to surgical resection to control blood pressure during tumor manipulation.

Key Concept

Diagnostic workup and perioperative surgical management of thyroid, parathyroid, and adrenal lesions.
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