What is non-functional pituitary tumor

Pituitary tumors are more common brain tumor, accounting for about 5% of brain tumor a 10%. In the past, the classification of pituitary tumor staining with more inspections to determine, in accordance with different staining divided into oncocytoma, basophilic and chromophobe tumor cell tumor. Recently a variety of methods for the establishment and continuous improvement, whether from the tumor cells with the ability to secrete hormones and divided into two categories: functional and non-functional pituitary tumor of the pituitary tumor. Function of pituitary tumors secrete hormones according to the type of tumor into growth hormone, prolactin tumor, tumor adrenocorticotropic hormone, thyroid stimulating hormone and gonadotropin of tumor, after the two kinds of rare. Function of pituitary tumors can be mixed exist, such as growth hormone prolactin tumor of 10. Originally pituitary tumor that accounts for about 80 per cent of the chromophobe tumor cells secrete hormones do not have the capacity, now finds many chromophobe cell tumor of the pituitary tumor is functional, about 30% of them 70% is a prolactin tumor. Therefore, the non-functioning of the pituitary tumor in the pituitary tumor in the percentage has dropped significantly, about 25 percent of pituitary tumors percent to 30 percent.