[Primary hyperparathyroidism. A retrospective study of 500 cases (author's transl)].

A retrospective study of more than 500 case-records of primary hyperparathyroidism was undertaken with the view of elucidating a number of problems raised in recent years: incidence of the disease, new clinical features, diagnostic methods and possible associations with other pathologies. The authors summarize the operative findings and the immediate or long-term results of surgical treatment, which on the whole are satisfactory and of long duration.

[Differentiation between parathyroid adenoma and hyperplasia. Proof by peroperative Wang floating test (author's transl)].

It is sometimes very difficult during operation to distinguish a normal parathyroid gland from a hyperplasic gland. The Wang test offers a solution, very simply demonstrating a difference in density between two glandular specimens. Normal parathyroid tissue, with its fat-containing cells, floats, in contrast to hypersecreting glands which are poor in lipid elements.

[65 orthotopic transplantations of the liver in the pig. Clinical and laboratory results (author's transl)].

The authors report the clinical and laboratory results of 65 orthotopic allotransplantations of the liver in the pig. The operative mortality (8 cases) was nil in the last 23 transplantations. Vascular filling without blood transfusion, blood alkalinisation and precautions to avoid hypothermia, seem essential to reduce early mortality.