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 seen in- 
Select and explain. 
A. Increased ptfcathyroid hormone, B. Increased thyroxine, C. Increase thyroid, D. Increased calcitonin
A: Increased ptfcathyroid hormone
Answer: A: Increased ptfcathyroid hormone 
Explanation: Brown tumour is seen in hyperparathyroidism. Brown tumours are not actually tumours but are localised accumulations of hemorrhage and blood pigments and reactive masses of osteoclasts in a spindle shaped stroma. Ref:harrison