It can happen if the cause can be found and corrected, although it takes a long time to heal completely, it depends on how much damage there is to heal.
Mine was caused from elavated blood sugars, classed as prediabetes but very close to full blown diabetic range, my PN symptoms have disappeared all together over approx 5 years period, i would say it is remission not cured because if i was to not look after my blood sugars, i am sure it would come back again.

Brian