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Mechanism of parathyroid tumourigenesis in uraemia Tominaga YNephrol Dial Transplant 1999[]; 14 Suppl 1 (ä): 63-5Clonal 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.|Humans[MESH]|Hyperparathyroidism, Secondary/genetics/pathology[MESH]|Hyperplasia[MESH]|Parathyroid Glands/pathology[MESH]|Parathyroid Neoplasms/*etiology/genetics[MESH]|Uremia/*complications[MESH] |
