Glial cysts are benign reactive changes that do not progress or infiltrate brain parenchyma. Patients experienced symptoms and signs related to anatomic locations of the cysts, such as headaches from obstructive hydrocephalus or seizure disorder. Astrocytomas are neoplasms, many or which may progress with time and kill patients eventually. Depending on the type and grade of astrocytoma, its clinical behavior varies a lot. In general, grade I astrocytoma includes pilocytic astrocytoma and subependymal giant cell astrocytoma. They are relatively indolent. Fibrillary astrocytomas are infiltrative in growth, and are graded II, III or IV depending on degrees of malignancy. Fibrillary astrocytomas eventually will kill the patients unless the initial resection is very successful. This, however, is rarely achieved because of their infiltrative nature. I am not certain whether this answers your question.

神经胶质囊肿是良性反应性病变，不浸润脑实质，患者可以出现与囊肿解剖部位相关的症状与体征，比如阻塞性脑水肿引起的头疼或癫痫发作。而星形细胞瘤是肿瘤性病变，很多会随着时间逐步进展以至致死。星形细胞瘤的临床行为随其类型、级别的不同有很大的差别。总的来说，WHOI级星形细胞瘤包括毛细胞型星形细胞瘤、室管膜下巨细胞星形细胞瘤，相对惰性一些。纤维型星形细胞瘤浸润性生长，根据其恶性程度可以是WHOII级、III级或IV级。纤维型星形细胞瘤最终会致患者死亡，除非首次手术非常成功。然而，因为星形细胞瘤浸润生长的特点很难做到。不知这是否是你要的答案。liguoxia71译。