A 40-year-old woman has a thyroid nodule measuring 1.8 cm with microcalcifications and irregular margins on ultrasound. FNA shows papillary thyroid carcinoma. What is the most appropriate surgical treatment?
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A
Lobectomy only
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B
Total thyroidectomy
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C
Total thyroidectomy with prophylactic central neck dissection
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D
Observation with repeat ultrasound