The nurse is caring for a patient newly diagnosed with a primary brain tumor. The patient asks the nurse where his or her tumor came from. What is the nurse's best response?
A) "Your tumor originated from somewhere outside the CNS from a cell just like other cells."
B) "Your tumor is from the pituitary gland in origin."
C) "Your tumor originated from a single cell that is genetically different from nearby cells."
D) "Your tumor is from nerve tissue somewhere in your body."
C
Feedback:
All cancers start with a single cell that is genetically different from the other cells in the surrounding tissue. Determining the site of the first cell to genetically mutate in this patient would require more information so it is impossible to say if the originating cell was in the CNS, the pituitary gland, or peripheral nerve tissue.
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