1.After treatment of gastric malignant lymphoma, pituitary lesions should be considered as the possibility of intracranial invasion of lymphoma, although brain parenchymal invasion is more common, while isolated pituitary invasion rarely occurs. 2. Most of the primary pituitary occupations are benign tumors, and surgery is the main treatment, and radiotherapy also has good effect. To sum up, the diagnosis should be clarified first.