Pituitary MRI plain scan is to check pituitary gland disease by MRI. If pituitary gland disease is suspected, MRI is best. Pituitary MRI can check whether there are lesions in the pituitary gland, and can find pituitary gland size, morphology, signal abnormalities, occupying effect and relationship with surrounding tissues. It has a great diagnostic value for pituitary adenomas, especially microadenomas smaller than 1 cm. The pituitary gland is located in the center of the base of the brain and can be divided into adenohypophysis and pituitary gland. The adenoid pituitary gland can secrete a variety of hormones, such as adrenal and gynecologic related hormones. Pituitary lesions are commonly seen in pituitary strokes and pituitary tumors. Pituitary stroke is dominated by pituitary hemorrhage and presents with headache, high cranial pressure, and visual field loss. Pituitary tumors are predominantly occupying and can compress the optic nerve and present with visual field defects. In the case of adenopituitary tumors, they can produce excessive hormones, such as sex hormones and adrenocorticotropic hormones, resulting in endocrine abnormalities that can produce a range of metabolic abnormalities, such as lactation, acromegaly, and dwarfism.