Endocrine Abstracts

Introduction: Brown tumors are rare, destructive, osteolytic bone lesions, occurring in advanced stages of hyperparathyroidism, due to increased osteoclastic activity.Case report: A 25-year-old woman presented with recent, intractable pain on the right shoulder and with hypercalcemia (Ca, 3.93 mmol/l) related to severe primary hyperparathyroidism (PTH, 494 pg/ml). Multiple osteolytic lesions, detected on the upper extremity of the right humerus, distal r...