Secondary hyperparathyroidism associated with multiple brown tumor: a case report

Brown tumour represents a serious complication of hyperparathyroidism. Definitive diagnosis is based on histological examination, clinical, radiological and laboratory data. Here we report a case of multiple brown tumours localised in collarbone, rib and in the distal ulna due to secondary hyperparathyroidism in a 37-year-old women with chronic renal failure. The clinical management of brown tumour aimed primarily to reduce the elevated parathyroid hormone levels by pharmacological treatment. In our experience, clinicians usually consider brown tumor of hyperparathyroidism is caused by giant cell lesions in maintenance hemodialysis recipients, and multiple brown tumours are rarely seen in these patients.