I just read this on the Cleveland Clinic's web site:
"Other conditions that may lead to the development of osteoarthritis include peripheral neuropathies (diseases of the nervous system) and neuromuscular disorders that put abnormal stress on the joint."
--I'm not sure how helpful it would be to know whether this is true or not, since presumably I'd have to deal with my developing knee arthritis the same way whether it's caused by the PN or not. But I'm wondering if anyone else has heard of this. (I tried searching the site but didn't come up with previous threads about this.)