1. you did just use that word in a sentence
2. if a doctor would use the word tumor in a sentence they would probably say "we need to remove the tumor from this persons body."
The surgeon carefully excised the tumor from the left side of the man's head.
The tumor is malignant.
The tests show that the tumor is malignant.
The tumor was tested and the doctor said it was malignant. That is a great sentence to use since the word means infectious disease.
He dabbled in the occult. she had an occult tumor.
Many people have brain tumors.
The tumor was benign; it was not harmful for now.
The oncologist informed her patient that the tumor was malignant.
A tumor was removed from Billy's lung, but thankfully it was benign.
The tumor is malignant, which means cancerous, so I'll have to have it removed.
My grandmother had a tumor removed for a biopsy. Fortunately, it was not malignant! (Meaning it was not cancerous)
Can you use the word concluding in a sentence? Done.