What is non-functional pituitary tumor

Pituitary tumors are more common brain tumor, brain tumor about the five percent of a 10 percent. In the past, the classification of pituitary tumors more staining inspection to determine, in accordance with different staining divided into oncocytoma, basophilic tumor and chromophobe cell tumor. Recently a variety of inspection methods of establishment and constant improvement of tumor cells can secrete hormones whether the capacity is divided into two categories: functional and non-functional pituitary tumor of the pituitary tumor. Functional hormone secreting pituitary tumor according to the type of tumor into growth hormone, prolactin tumor, ACTH tumor, tumor and thyroid stimulating hormone gonadotropin of the latter two kinds of rare. Function of pituitary tumor may also be mixed exist, such as growth hormone prolactin tumor of 10. Thought about pituitary tumors 80% of the chromophobe cell tumor secreting hormones do not have the capacity now discovered that many chromophobe cell tumor is functional pituitary tumor, which in about 30 percent of a 70 percent prolactin tumor. Therefore, the non-functioning of the pituitary tumor in the pituitary tumor in the percentage has been greatly decreased, or about pituitary tumors 25% a 30%.