幕上复发性星形细胞瘤的CT诊断与相关问题研究

CT Diagnosis of Supratentorial Recurrent Astrocytoma and It's Related Problems

本文对48例SRA的CT表现与相关问题进行了分析。主要CT征象为:(1)原发灶部位复发者的强化灶,多呈环形强化,而水肿、占位效应较轻。(2) 相邻或远隔部位复发者,出现新的强化灶。(3) 强化后CT扫描,SRA恶性者,边界常变清楚。(4) SRA以原位复发为主。导致上述CT征象的原因,可能为:①SRA自身的病理变化。②术后颅脑解剖结构的改变。③术后放化疗的影响。

The CT marnifestations and it's related problems of 48 eases of SRA were as follows: 1. Enhancing lesion appeared in the original site, usually ring enhancement with slight degree of surrounding edema and little space taking. 2. Recurrence in the neighbouring place or far site appeared as new enhancing lesion. 3. The margin of the malignant SEA in the post contrast CT scan was usually clear. 4. The place of recurrence of SRA was mainly in the original site. Analysis of the causes leading to the above CT changes may be due to: ①The patholog ical changes of SRA itself. ②The changes of postoperative anatomical structure of the cranium and brain. ③Influences of postoperative radiotherapy and chemotherapy.