MR characteristics of supratentorial intraparenchymal ependymoma in different age groups / 实用放射学杂志

ABSTRACT

Objective To assess MR characteristics of supratentorial intraparenchymal ependymomas(SIEs)in different age groups.Methods 40 patients with SIEs confirmed by surgery and pathology were analyzed retrospectively.All patients were examined by head MRI without or with contrast.Patients were divided into two groups according to age:child and adult group.T test was used to analyze the difference of tumor volume of two groups.Mann-Whitney U test was used to compare cystic,edema and pathological types of two groups.χ2test was used to distinguish sexual distinction.Results 39 cases of SIEs were located in cerebral surface,1 case located in inside cerebral essence.SIEs of child group(n=13)were male dominance(n=11),5 cases were located in the frontal lobe,all lesions were cystic solid masses.In the adult group(n=27),13 cases were male,9 cases were located in the frontal lobe,solid tumors were seen in 3 cases.There were significant difference among two groups in sexual distinction(χ2=3.921,P=0.048)and cystic change(U=98.50,P=0.02).There were no significant difference in the volume of tumor(t=1.828,P=0.087),edema(U=219.00,P=0.49)and pathological types(U=258.00,P=0.10).Conclusion There are MR characteristics differences in the SIEs in different age groups.Child has a superiority of male,tumors are mainly as cystic-solid mass,edema of the tumor is mild and has a high incidence cystic necrosis,the border is clear.In adult group,tumors are mainly as cystic-solid mass,and can also be solid mass, the solid portion of the lesion is easy to bleed,edema of the tumor is serious.