UNASSIGNED: Childhood @entity1313 show great histological variability. The goal of this retrospective study was to assess the diagnostic accuracy of multimodal MR imaging (diffusion, perfusion, MR spectroscopy) in the distinction of pediatric @entity1313 grades and types. Seventy-six @entity1 (range 1  month to 18  years) with @entity1313 underwent multimodal MR imaging. @entity5 were categorized by grade (I-IV) and by histological type (A-H). Multivariate statistical analysis was performed to evaluate the diagnostic accuracy of single and combined MR modalities, and of single imaging parameters to distinguish the different groups. The highest diagnostic accuracy for @entity5 grading was obtained with diffusion-perfusion (73.24  %) and for @entity5 typing with diffusion-perfusion-MR spectroscopy (55.76  %). The best diagnostic accuracy was obtained for @entity5 grading in I and IV and for @entity5 typing in @entity5 and @entity816 . Poor accuracy was seen in other grades and types. ADC and rADC were the best parameters for @entity5 grading and typing followed by @entity1877 level with an intermediate echo time, CBV for grading and Tmax for typing. Multiparametric MR imaging can be accurate in determining @entity5 grades (primarily grades I and IV) and types (mainly @entity816 and @entity5 ) in @entity1 .

The diagnostic accuracy of XXXX grades and types.

@entity1 :: ('9606', 'Species') :: ['children', 'patients'] @entity1313 :: ('MESH:D001932', 'Disease') :: ['brain tumor', 'brain tumors'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'Tumors', 'embryonal tumors', 'embryonal tumor'] @entity1877 :: ('MESH:D002794', 'Chemical') :: ['choline'] @entity816 :: ('MESH:D001254', 'Disease') :: ['pilocytic astrocytomas', 'pilocytic astrocytoma']
@entity1313 :: (MESH:D001932,Disease) :: ['multiparametric MRI to determine pediatric brain tumor']
