Clinical pituitary adenomas are usually divided into two categories: those that function as hormone secretors and those that do not. The former is known to affect the secretion of hormones, while the latter is known to have a “big body” that “rampages” through the human brain and affects people’s normal lives. Let’s start with the location of the pituitary gland, the “main battleground”. The pituitary gland is located in the cranial “traffic artery” and is surrounded by very complex and delicate important structures, including: the optic nerve, the optic cross, and the pituitary stalk. The lateral walls of the sphenoid sinus (blue sieve-like structure) are lined from top to bottom with the ophthalmic and maxillary branches of the actinomotor nerve, the talocrural nerve, the ophthalmic and maxillary branches of the trigeminal nerve, as well as the abducens nerve and the cavernous segment of the internal carotid artery, which are located in the center of the sphenoid sinus. Among them, the abducens nerve and the cavernous sinus segment of the internal carotid artery are more likely to be injured because they are closer to the pituitary gland. As a result, any operation performed on the pituitary gland can be described as walking on thin ice and facing the abyss. However, there is a pituitary tumor that “squeezes” the pituitary gland and its surrounding tissues. We call this type of pituitary adenoma, which “squeezes” the surrounding tissues, “pituitary non-functional adenoma”. It is like a “lazy man” who only “gets fat” and does not work (does not produce hormones). However, unlike the real lazy man, when the “fat pituitary” gains weight to a certain extent, it will compress the normal pituitary gland and other surrounding tissues, thus bringing adverse effects to the organism: 1, under the influence of compression, the normal pituitary tissue will become dysfunctional and the normal secretion of hormones will be reduced, so this kind of pituitary gland can be in a low-functioning state. 2. The tumor continues to increase in size will also compress the normal structures around the pituitary gland (occupancy effect), which can lead to headache, visual field defects and other symptoms. Doctor’s tip: Although pituitary adenoma is not big, it is not small in size and needs clinical intervention as soon as possible after detection. For tumor types that cannot be controlled by medication, the tumor can be surgically removed to relieve the pressure of the tumor on the surrounding tissues and relieve the symptoms.