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
Brown tumour is found in 
Select and explain. 
A. Hypoparathyroidism, B. Hyperparathyroidism, C. Hypocalcemia, D. Hypothyroidism
B: Hyperparathyroidism
Answer: B: Hyperparathyroidism 
Explanation: (Hyper parathyroidism) (990- CMDT-08) (1765-H17th)Hyper parathyroidism causes a loss of cortical bone and again of trabecular bone. Osteitis fibrosa cystica may present as pathologic fracture or as "brown tumours " or cysts of Jaw.More commonly, patients have bone pain and arthralgia