parallels在此如何翻译？

1.  In case of febrile headaches during the course of Behçet’s disease, cerebral thrombophlebitis must be ruled out by an angio-scanner or angio-MRI and then CSF examination to identify meningitis; parenchymal neurological involvement frequently parallels aseptic meningitis with lymphocyte predominance or neutrophils.

如果在白塞综合征病程中出现发热性头痛，需通过血管扫描/MRI排除脑血栓性静脉炎，并通过脑脊液检查排除排除脑膜炎。脑实质性神经系统受累通常与无菌性脑膜炎并行伴淋巴细胞为主或中性粒细胞。

问题：parenchymal neurological involvement与 parallels aseptic meningitis常并行存在，还是说两者相似？