A Patient Has Been Diagnosed with a Grade 1 Astrocytoma

A patient has been diagnosed with a grade 1 astrocytoma, an intra-axial brain tumor. The patient asks, "What are my chances of surviving this thing?" The nurse's response is based on which information?

A) A grade 1 astrocytoma is a very aggressive form of this type of tumor.
B) It depends on whether the tumor metastasizes outside the brain.
C) Age is the greatest predictor of patient survival.
D) This type of tumor has a survival rate of 10 years.