CT and MRI Features of Different Grades of Astrocytoma in Pineal Region in Children
Objective To investigate the CT and MRI features of different grades of astrocytoma in the pineal region in children.Methods The CT and MRI data of 17 patients with pineal region astrocytoma in children confirmed by surgery and pathology from January 2005 to March 2022 were retrospectively analyzed.The tumor size,morphology,calcification,density,signal intensity,apparent diffusion coefficient(ADC)value and enhancement patterns were recorded.Results Of the 17 patients,6 cases were WHO grade Ⅰ,7 cases were WHO grade Ⅱ,and 4 cases were WHO grade Ⅲ.All tumors were round or oval masses with the maximum diameter ranged from 1.95 to 4.52cm.Calcifications were seen in 4 cases in 17 patients and the calcification patterns were engulfed punctate and plaque calcification.CT scan showed slightly low density in grade Ⅰ-Ⅱ and slightly high density in grade Ⅲ.The tumor showed slightly low signal on T1WI and slightly high signal on T2WI.After enhancement,the solid components of the tumor were significantly enhanced.The ADC values of the tumors ranged from 0.83 to 1.46 × 10-3mm2/s.Conclusion CT scan of The pineal region astrocytoma of children were low density on CT scan and low signal intensity on T1WI.The signal intensity on T2WI decreases gradually with the increase of tumor grade.The high ADC value and obvious enhancement after enhancement were its characteristics.
万方数据
维普
