如何分析？谢谢

RP may affect the nasal cartilage, causing saddle-nose deformity (Fig. E2), structures of the inner ear leading to auditory or vestibular complications, and ocular structures.

RP may affect the nasal cartilage and ocular structures是主句吗？如果主句是RP may affect the nasal cartilage 、 structures of the inner ear and ocular structures，那为啥causing saddle-nose deformity与nasal cartilage之间要有逗号？而leading to auditory or vestibular complications与structures of the inner ear就没有逗号了?难道有逗号的相当于非限制性定语从句，没有逗号的相当于限制性定语从句？

causing saddle-nose deformity (Fig. E2), structures of the inner ear leading to auditory or vestibular complications如何分析？

尤其是structures of the inner ear leading to auditory or vestibular complications如何分析？

RP还可能影响到鼻软骨，导致鞍鼻畸形(图E2)，影响到内耳结构从而导致听觉或前庭系统并发症，最后还可能影响到眼部结构。

对吗？谢谢