[Quintary hyperparathyroidism].

The quartary and quintary hyperparathyroidism is observed following a primary hyperparathyroidism, in which the removal of the adenoma of the parathyroid did not lead to a reduction of the process of the disease. The nephropathy which developed during the basic disease and continued to exist after the operation leads to repeated consequences for the mineral metabolism which cause a condition of parathyroidal load and after this again an adenomatous process. The author adopts a definite attitude to the problems of heuristic biochemical parameters and generally to the question of such consecutive reactions.