Brown tumour is seen in-: (A) Increased ptfcathyroid hormone, (B) Increased thyroxine, (C) Increase thyroid, (D) Increased calcitonin
Answer is A. 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