Two Cases of Parathyroid Carcinoma in Patients on Long-Term Hemodialysis

Abstract
Two cases of parathyroid carcinoma, in a 46-year-old male on maintenance hemodialysis for 135 months and a 55-year-old female on maintenance hemodialysis for 64 months were reported. In both cases, the parathyroid carcinoma showed local invasion and the other glands were hyperplasia and/or adenoma, which would support the concept of malignant transformation occurring in parathyroid hyperplasia. The concurrence of parathyroid carcinoma with hyperplasia and/or adenoma is a pertinent feature in patients on maintenance dialysis, although it is rare in primary parathyroid carcinoma.

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