text: Other imaging studies for<unk>  include MR spectroscopy (dominant N-acetyl aspartate peak, increased choline levels and decreased NAA levels with a myo-inositol peak), MRperfusion (increased "chicken wire" network of vascularity, which results in elevated relative cerebral blood volume), PET scan (to differentiate between<unk>  from anaplasticoligodendroglioma and tumor recurrence from tumor necrosis), and bone scan (bone metastasis).
option_0: Oligodendroglioma other imaging findings
option_1: Oligoastrocytoma other imaging findings
option_2: Meningioma other imaging findings
option_3: Brain Stem Gliomas other imaging findings
option_4: Medulloblastoma other imaging findings
option_5: Oligoastrocytoma other diagnostic studies
option_6: Oligodendroglioma MRI
option_7: Glioblastoma multiforme other diagnostic studies