Minimally invasive surgery can be performed for pituitary tumors of 4 cm. With the progress of modern medicine and the significant improvement of surgical instruments and surgical equipment, minimally invasive surgery is mainly used for pituitary tumors, i.e., neuroendoscopic surgery to remove tumors via the nasal pterygoid sinus. In the past, without advanced medical equipment and technology, craniotomy was usually performed for pituitary tumors larger than 3 cm, which was more traumatic and caused certain damage to brain tissue. With the development of neuroendoscopic technology and the invention of minimally invasive surgical instruments, minimally invasive surgery can be performed for pituitary tumors, regardless of their size, and multi-directional and multi-angle observation of the tumor can be performed under neuroendoscopy to remove the tumor. The surgery is less invasive, the patient recovers faster, and the surgical results are better.