Multifocal Brown Tumor as A Manifestation Of Primary Parathyroid Carcinoma. A Case Report
DOI:
https://doi.org/10.53903/01212095.50Keywords:
Osteitis fibrosa cystica, Parathyroid neoplasms, Primary hyperparathyroidism, RadiographyAbstract
Parathyroid carcinoma is an exceptional cause of primary hyperparathyroidism. Brown tumors develop as skeletal manifestations of primary hyperparathyroidism in the context of advanced disease. They are highly vascular, lytic bone lesions with a reparative cellular process instead of a neoplastic process. They can be identified in the secondary forms of the disease, however, they are more frequent in primary hyperparathyroidism. We present a case of multiple brown tumors secondary to parathyroid carcinoma. The initial manifestation of primary hyperparathyroidism was a pathological fracture secondary to brown tumor associated with hypercalcemia and elevated levels of parathyroid hormone (PTH), which is rare due to the fact that in recent decades the incorporation of serum calcium in routine laboratory tests detects this disease in asymptomatic or minimally symptomatic stages. Ultrasound detected a vascularized solid lesion in the anatomical site of the left lower parathyroid and nephrocalcinosis. The lesion was surgically resected in the left hemicolumn and the biopsy reported parathyroid carcinoma. Brown tumors are non-neoplastic lesions that do not have malignant potential and are therefore considered repairing granulomas.
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