Abstract
The term primary cutaneous amyloidosis (PCA) usually includes macular (MA), lichenoid (lichen amyloidosus, LA), nodular, 1–3 and PUVA-induced amyloidosis. 4With the exception of the rare nodular form, they are thought to be caused by a filamentous degeneration 5 of keratin-type intermediate filaments with subsequent apotosis and conversion of filamentous masses into amyloid material. Histopathologically, amyloid deposits are observed in the papillary and subpapillary dermis.
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