The Treaty of Fort Laramie (also called the Sioux Treaty of 1851) was an agreement between the United States and the Oglala, Miniconjou, and BrulÃ© bands of Lakota people, Yanktonai Dakota and Arapaho Nation signed on April 29, 1868 at Fort Laramie in the Wyoming Territory, guaranteeing the Lakota ownership of the Black Hills, and further land and hunting rights in South Dakota, Wyoming, and Montana.
Tumors may occur at any age, but many types of tumors are most common in a certain age group. In adults, gliomas and meningiomas are most common. Gliomas come from glial cells such as astrocytes, oligodendrocytes, and ependymal cells. The gliomas are divided into three types: Astrocytic tumors include astrocytomas (can be noncancerous), anaplastic astrocytomas, and glioblastomas.
Gliomas are the most common primary intracranial tumor, representing 81% of malignant brain tumors. Although relatively rare, they cause significant mortality and morbidity. Glioblastoma, the most common glioma histology (â¼45% of all gliomas), has a 5-year relative survival of â¼5%. A small portion of these tumors are caused by Mendelian disorders, including neurofibromatosis, tuberous sclerosis, and Li-Fraumeni syndrome.