doctor on defocused background holds in his hand anatomic model of human brain, pointing with pen in hand on brain in foreground.

adenoma anatomy background brainstem cerebrum cortex defocused diagnosis disease doctor enlarged focus foreground function gland grey hand health hold hormone hyperplasia hypophysis illness inflammation insufficiency learning localizing matter medical metabolism neuroscience overproduction pathology physician physiology pituitary pointing problem problems structure study surgeon symptoms teaching test tumor university