Assertion: brain tumor | /r/MadeOf | cancer cells
Facets:
Source sentences:
text: Some brain tumors contain cancer cells and others don't:
text: A brain tumor is considered malignant if it contains cancer cells, or if it is composed of harmless cells located in an area where it suppresses one or more vital functions.
text: A brain tumor is considered malignant if it contains cancer cells, or if it is composed of harmless cells located in an area where it suppresses one or more vital functions.