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Nephrology Dialysis Transplantation, Vol 14, Issue 90001 63-65, Copyright © 1999 by Oxford University Press

ORIGINAL ARTICLES

Mechanism of parathyroid tumourigenesis in uraemia

Y Tominaga
Department of Transplant Surgery, Nagoya 2nd Red Cross Hospital, 2-9 Myoken-cho Showa-ku, Nagoya 466, Japan

Clonal analysis has shown that in renal hyperparathyroidism (2-HPT), parathyroid glands initially grow diffusely and polyclonally after which the foci of nodular hyperplasia are transformed to monoclonal neoplasia. There is a great deal of information about genetic abnormalities contributing to the tumourigenesis of parathyroid neoplasia in primary hyperparathyroidism. It is speculated that allelic loss of the MEN1 suppressor gene and overexpression of cyclin D1 induced by rearrangement of the parathyroid hormone gene may be the major genetic abnormality in sporadic parathyroid adenoma but not in 2-HPT. The pathogenesis of 2-HPT, abnormality of the Ca2+-sensing receptor (CaR) gene and the vitamin D receptor gene may possibly contribute to parathyroid tumourigenesis in 2-HPT. However, this is not yet clear and heterogeneous and multiple genetic abnormalities may be responsible for the progression of secondary parathyroid hyperplasia.
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