This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'A young man presented with hyper parathyroidism. Which of the following radionuclide scan is done for parathyroid adenoma? \nSelect and explain. \nA. Sesta MIBI scan, B. Iodine-123 scan, C. 99mTc-sulphur colloid, D. Gallium scan', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The localization ability of Technetium 99m sestamibi scintigraphy is based on its preferential uptake by parathyroid cells, due to their high mitochondrial activity. Delayed images taken 2 to 3 h after injection are sensitive in up to 90% of single adenoma cases, with over 90% specificity. Sestamibi imaging is also effective in cases of double adenoma. However, it has significantly reduced accuracy in cases of four-gland hyperplasia. Ref: Singer M.C., Terris D.J. (2012). Chapter 43. Parathyroid Disorders. In A.K. Lalwani (Ed), CURRENT Diagnosis & Treatment in Otolaryngology--Head & Neck Surgery, 3e.', 'role': 'assistant'}]