Synchronous Sporadic Carcinoma and Primary Hyperplasia of the Parathyroid Glands: A Case Report and Review of the Literature

Parathyroid carcinoma is the least common endocrine malignancy. Although it has been noted to be associated with certain clinical factors, such as familial hyper-parathyroidism, its etiology remains unknown. In rare instances, particularly in patients with chronic renal failure, it has been proposed...

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Bibliographic Details
Published in:International journal of surgical pathology 2006-10, Vol.14 (4), p.336-339
Main Authors: Sinha, S., Sinha, A., McPherson, G. A. D.
Format: Article
Language:English
Subjects:
Cell Proliferation
Female
Humans
Hyperparathyroidism - pathology
Hyperplasia - pathology
Middle Aged
Parathyroid Glands - pathology
Parathyroid Neoplasms - pathology
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Summary:Parathyroid carcinoma is the least common endocrine malignancy. Although it has been noted to be associated with certain clinical factors, such as familial hyper-parathyroidism, its etiology remains unknown. In rare instances, particularly in patients with chronic renal failure, it has been proposed that parathyroid carcinoma can arise from malignant transformation of benign lesions. We present a case of synchronous malignant and primary hyperplastic parathyroid disease in a patient with normal renal function. A 46-year-old woman was seen with symptomatic refractory hypercalcemia. Investigations suggested a hyperactive parathyroid gland. Operative findings were of a low-grade parathyroid carcinoma in concurrence with diffuse hyperplasia of the remaining glands. To our knowledge this represents the fifth reported case. The possibility of malignant change in hyperplastic parathyroid tissue has implications for patient management and follow-up, particularly if tissue is left in situ to maintain hormonal function.
ISSN:1066-8969
1940-2465
DOI:10.1177/1066896906290839