A full pituitary gland is not necessarily a pituitary tumor. Because the pituitary gland can physiologically enlarge during the reproductive stage, i.e., pregnancy, and puberty, and physiological enlargement is not a pathologic enlargement, this condition is called compensatory enlargement. When fullness of the pituitary gland is detected, it is necessary to further improve the MRI examination of the pituitary gland, enhancement scanning and endocrine hormone index examination. Sometimes it is also necessary to repeat the examination at intervals to understand the changes in the pituitary gland in order to exclude pituitary tumors. Therefore, a full pituitary gland is not a pituitary tumor, but the patient needs to be monitored dynamically, and the pituitary MRI and pituitary hormone tests should be repeated at any time.