Dugan writes about a patient whose fiancée revealed to him that she suffered from syphilis; the patient after this revelation developed hyperthyroidism. In his seventh session in psychotherapy, the patient with great emotion told the therapist of this revelation and of its meaning to him. Shortly thereafter the patient developed psychotic symptoms. The author supposes that the fiancée's revelation precipitated the patient's thyrotoxicosis. He does not believe that the psychosis was due to the thyrotoxicosis, but rather that the symptoms were essentially those of a psychotic depression caused by the psychotherapy, which reawakened infantile neurotic fears.