NCIt definition : Amyloidosis that arises and remains localized in the skin. There are three main forms
of primary cutaneous amyloidosis: lichen amyloidosis presenting with multiple itchy,
raised, scaly red/brown spots; macular amyloidosis presenting with itchy, flat, brown
or grey spots that form patches of darkened skin; and nodular amyloidosis presenting
with brown or red nodules.;