Has MR spectroscopy ever led you to forego a planned stereotactic biopsy in a patient with a suspected intracranial neoplasm?

I have never had spectroscopy allow me to forego a stereotactic biopsy when I suspected active/progressive neoplasm; however, if I suspected necrosis more than recurrence or tumor and spectroscopy was in accordance with that, then I have been able to save people a biopsy in that situation.

In our institution, MR spectroscopy (MRS) has been superseded by MR perfusion (MRP) as the test of choice for differentiating tumor from non-neoplastic processes.

In my experience, MRP results have helped decide whether a biopsy might be helpful but have never led us to forego getting a biopsy in a ...