Specific staining of the thyroid follicular cell apical membrane by nitroblue tetrazolium.

Nitroblue tetrazolium (NBT) has been widely used to demonstrate redox systems, particularly in phagocytizing polymorphonuclear leukocytes. Based on the striking similarities between redox metabolism in leukocytes and in the thyroid, we studied NBT reduction by microscopic techniques and NBT effects in thyroid metabolism in dog-thyroid slices in vitro. We observed specific localization of NBT reduction product along the apical membrane of the follicular cell.

[Fine-needle aspiration (F.N.A.) of thyroid cold nodules (author's transl)].

In a retrospective study of 100 patients operated on between 1974 and 1979 in our institution for thyroid cold nodules, an 8% incidence of thyroid cancer was found at surgery. Since 1979, F.N.

Mauriac syndrome: three cases with retinal angiofluorescein study.

Three children with features of the Mauriac syndrome have been studied. Ocular complications, mainly characterized by increased capillary permeability have been demonstrated by fluorescein angiography. A decreased proximal tubular beta 2-microglobulin reabsorption has been found in one patient, and in another one, there was a slowed sensory nerve condition velocity.