通常见于因儿童期的中枢神经肿瘤而行同时行放化疗的患者，虽然也可以见于单纯行放疗的患者。
It is usually seen following combined radiation and chemotherapy for the treatment of CNS neoplasm in childhood, although it can be seen in patients receiving only radiation.
直肠癌术前放化疗过程的不同时间点体积变化无法准确提示肿瘤是否降期。
So the higher DWI volumetric tumor reduction rate is more inclined to have negative nodes in rectal cancer with preoperative chemoradiotherapy.
直肠癌术前放化疗过程的不同时间点体积变化无法准确提示肿瘤是否降期。
So the higher DWI volumetric tumor reduction rate is more inclined to have negative nodes in rectal cancer with preoperative chemoradiotherapy.
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