Primary cutaneous amyloidosis
# Primary cutaneous amyloidosis

Primary cutaneous amyloidosis is a form of amyloidosis associated with oncostatin M receptor.

This type of amyloidosis has been divided into the following $types:^{:520}$

* Macular amyloidosis is a cutaneous condition characterized by itchy, brown, rippled macules usually located on the interscapular region of the $back.^{:521}$ Combined cases of lichen and macular amyloidosis are termed biphasic amyloidosis, and provide support to the theory that these two variants of amyloidosis exist on the same disease spectrum.
* Lichen amyloidosis is a cutaneous condition characterized by the appearance of occasionally itchy lichenoid papules, typically appearing bilaterally on the $shins.^{:521}$
* Histopathology of lichen amyloidosis, with subepithelial Congo red-positive deposits
* Lichen amyloidosis on a 56-year-old male's leg
* Lichen amyloidosis on a 56-year-old male's leg
