<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 25-year-old man presents to his physician for new-onset palpitations and tremors in his right hand. He also feels more active than usual, but with that, he is increasingly feeling fatigued. He lost about 3 kg 6.6 lb in the last 2 months and feels very anxious about his symptoms. He survived neuroblastoma 15 years ago and is aware of the potential complications. On examination, a nodule around the size of 2 cm is palpated in the right thyroid lobule; the gland is firm and nontender. There is no lymphadenopathy. His blood pressure is 11875 mm Hg, respirations are 17min, pulse is 87min, and temperature is 37.5C 99.5F. Which of the following is the best next step in the management of this patient?? A: Ultrasound examination, B: Radionuclide thyroid scan, C: Fine needle aspiration with cytology, D: Life-long monitoring, E: Thyroid hormone replacement therapy,  <response>: This is a clinical case scenario about a 25-year-old man with symptoms and signs suggestive of hyperthyroidism, likely due to thyroid nodule. The key findings are palpitations, tremors, weight loss, anxiety, and a palpable thyroid nodule. The question asks for the best next step in management. The choices include imaging studies like ultrasound and radionuclide scan to evaluate the nodule, cytology to obtain a tissue diagnosis, monitoring, and starting treatment. As this patient has a suspicious nodule, the best next step would be to obtain a tissue diagnosis to determine if the nodule is benign or malignant. Imaging studies are useful to characterize the nodule but cannot provide a definitive diagnosis. Starting treatment or monitoring alone without a tissue diagnosis would not be appropriate as it delays diagnosis of potential thyroid cancer. C: Fine needle aspiration with cytology 