[Hann syndrome: remission of diabetes insipidus by functional failure of the anterior pituitary gland].

We know that the symptoms of diabetes insipidus develop only in a state of functional capacity of the neurohypophysis. The symptomatology of diabetes insipidus disappears, when the pars anterior of the hypophysis is destructed, whereas the two lobes have antagonistic effects in respect of water metabolism. Describing two cases the authors remember to F. v. Hann as the first describer of this syndroms' complex and postulate the corresponding nomination.