Tumors can be benign (noncancerous) or malignant (cancerous). Benign tumors tend to grow slowly and do not spread. Malignant tumors can grow rapidly, invade and destroy nearby normal tissues, and spread throughout the body.
Nothing. HIPPA. You can suggest the 18 year old to say something, but you are bound by law to keep her secret unless she is in danger of hurting herself or others.
