Brown tumour is seen in
Brown's tumour: This is an expansile bone lesion, a collection of osteoclasts. It commonly affects the maxilla or mandible, though any bone may be affected. Commonly seen in Hyperpathyroidism Ref: Maheshwari 6e pg 313.
Hyperparathyroidism
Hypoparathyroidism
Hypothyroidism
Hypehyroidism
Tumors