In the United States, the annual incidence of<unk>  is approximately 1 in one million (300 new patients each year). There are currently no known environmental risk factors for<unk> . As noted above germline duplication of brachyury has been identified as a major susceptibility mechanism in several<unk>  families. While most people with<unk>  have no other family members with the disease, rare occurrences of multiple cases within families have been documented. This suggests that some people may be genetically predisposed to develop<unk> . Because genetic or hereditary risk factors for<unk>  may exist, scientists at the National Cancer Institute are conducting a Familial<unk>  Study to search for genes involved in the development of this tumor.
Chordoma
Neurothekeoma
Brown tumor
Neuroma
Ependymoma
Germinoma
Ameloblastoma
Medulloblastoma