This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
Imaging of choice for parathyroid pathology is 
Select and explain. 
A. CT scan, B. Gallium scan, C. Thallium scan, D. Tc 99 scan
D: Tc 99 scan
Answer: D: Tc 99 scan 
Explanation: The primary purpose of imaging is to accurately localize the disease gland and identify patients who are suitable for minimal invasive surgery (solitary adenoma). Sonography and 99mTc-sestamibi scintigraphy are the dominant imaging techniques for the preoperative location of parathyroidpathalogies . Ref - harrisons internal medicine 20e topic parathyroid adenoma