Objective      To determine the relationship between the magnetic resonance imaging (MRI) appearance and pathology classification in oligodendroglial tumors.       Methods      MR images of 104 cases of identified oligodendroglial tumors who received MRI from 1998 to 2010 were retrospectively observed. The tumor site

shape

edge

border

signal characteristics

cystic degeneration

hemorrhage

infiltrating range

peritumoral edema

massive effection

enhancement patterns and levels were studied. These data were analyzed with pathologic grading to obtain the relationship of MRI image fact

ors with tumor pathology classification.       Results      The average morbidity age was 42.37

and the male and female ratio was 1∶1. The sites at frontal lobes were in 62 cases

temporal lobes in 24 cases

parietal lobes in 13 cases

and a few cases were respectively at occipital lobe

cerebellum

lateral ventricle

saddle area

cerebellopontine angle area

cingulate cortex

fourth ventricle and thalamus. There was no significant relationship among tumors which had different pathologic grades in the tumors site

shape

signal

edge

realm

peritumoral edema

cystic degeneration and enhancement levels (

P

>0.05)

but significant relationship in the tumor hemorrhage

infiltration scope

massive effection and enhancement patterns（

P

<

0.05）.       Conclusion      Tumor hemorrhage

infiltration scope

massive effection and enhancement patterns of oligodendroglial tumors in MR image are closely related to pathological classification

so they can be used to judge the benign and malignant degree among the tumors.