Assertion: neurofibromatosis | /r/HasProperty | characterized by tumor
Facets:
Source sentences:
text: Neurofibromatosis is characterized by tumors that are mostly benign, but in around 10 percent of individuals, the neurofibromas may have malignant (cancerous) changes.
text: Neurofibromatosis is a genetic disorder characterized by tumors or neurofibromas that grow in the nervous system and under the skin.