[The Houssay phenomenon in man (author's transl)].

Marked insulin sensitivity, accompanied by unusual hypoglycaemic symptoms, was observed in three patients with juvenile diabetes mellitus. All three had anterior hypopituitarism, developing post-partum in two, a craniopharyngioma being the cause in the third. These are thus three examples of the Houssay phenomenon of which only 37 cases have previously been described.