Is lichen amyloidosis a life killing decease?

See. If the amyloid deposits are limited to the skin the outlook in terms of mortality is good. See: http://goo.Gl/f9aws.
It shouldn't be!!! Treatment of lichen amyloid is often difficult, with some patients trying various agents before any improvement. Among those who respond to treatment, many will have adverse effects of treatment or relapse once the treatment is withdrawn. This recalcitrant condition adopts a chronic nature.