The present interest in endocrine disorders and the apparent increasing frequency with which the roentgenologist is called upon to assist in the diagnosis of these conditions have caused the roentgen demonstration and interpretation of changes in the sella turcica to become of considerable importance. The value, however, of the roentgen interpretation in these cases is dependent on a knowledge of the normal structure as revealed not only by roentgenologic studies on normal individuals, but on actual anatomic specimens as well. Unfortunately, the latter prerequisite was underestimated by early workers and as a result there have arisen certain conclusions which cannot be substantiated by anatomic facts. I refer particularly to the so-called “bridged sella,” which has been cited from time to time as a cause for diabetes insipidus, epilepsy, and migraine. This anatomic variation, which consists of a bony union between the anterior and posterior clinoid processes with occasional inclusion of the middle clinoid...