Definitions for "Primary brain tumor"
a mass created by the growth or uncontrolled proliferation of cells in the brain
a tumor that begins in the brain, as opposed to a secondary (or metastatic) brain tumor, which begins in another organ and metastasized to the brain
A tumor arising from cells in the brain or surrounding tissue (in contrast to a metastatic tumor).
Keywords:  abnormal, growth, cells
an abnormal growth of cells