Assertion: primary brain tumor | /r/HasProperty | cancerous
Facets:
Source sentences:
text: A primary brain tumor is one that originates in the brain, and not all primary brain tumors are cancerous; benign tumors are not aggressive and normally do not spread to surrounding tissues, although they can be serious and even life threatening.
text: In addition, primary brain tumors can be malignant, or cancerous, or benign (non-cancerous).