Orthopaedics Metabolic Bone Disease 0782fefd Brown tumor is characteristic of? A Hyperparathyroidism B Hypoparathyroidism C Hyperthyroidism D Hypopituitarism High-Yield Explanation Ans. A. HyperparathyroidismBrown tumor occurs due to the increased osteoclastic activity in hyperparathyroidism. It is a benign mass of reactive tissue.