Many individuals have<unk> ta, but remain asymptomatic, so the<unk> ta are discovered during an autopsy. One to two percent of all autopsies reveal<unk> ta that were unknown to the individuals during their lifetime, since there were never any symptoms. In the 1970s, tumors causing symptoms were discovered in 2 out of 100,000 people, while tumors discovered without causing symptoms occurred in 5.7 out of 100,000, for a total incidence of 7.7/100,000. With the advent of modern sophisticated imaging systems such as CT scans, the discovery of asymptomatic<unk> ta has tripled.<unk> ta are more likely to appear in women than men, though when they appear in men, they are more likely to be malignant.<unk> ta may appear at any age, but most commonly are noticed in men and women age 50 or older, with<unk> ta becoming more likely with age. They have been observed in all cultures, Western and Eastern, in roughly the same statistical frequency as other possible brain tumors.
Meningioma
Metastasis
Glioma
Solitary fibrous tumor
Hemangioblastoma
Lymphoma
Astrocytoma
Schwannoma