2019年3月13日 · Lichen amyloidosis is the most common type of primary localized cutaneous amyloidoses (amyloid deposits are exclusively localized in the skin). The three main forms of primary localized cutaneous amyloidosis are lichen amyloidosis, macular amyloidosis, and nodular amyloidosis.

Primary cutaneous amyloidosis (PCA) encompasses a group of skin conditions characterised by deposition of amyloid protein, without internal organ involvement. It is subclassified into lichen amyloidosis, macular amyloidosis, and nodular amyloidosis.

Most often the cause of lichen amyloidosis is idiopathic but can be friction related. Lichen amyloidosis is the most common type of cutaneous amyloidosis in Chinese individuals, usually affecting adults.

Lichen amyloidosis is the most common form of primary localized cutaneous amyloidosis. 1 The cause is unknown, but the condition is thought to be induced by scratching. 2 Owing to its benign nature, few studies have examined the condition’s prevalence, but it typically presents in the 5th or 6th decade of life. 3 The condition is more common ...

Lichen amyloidosis is believed to be more prevalent among Southern Chinese and South American populations. It is more common in males than in females and occurs most frequently in persons aged...

2023年8月14日 · Lichen amyloidosis (LA) is a dermatologic condition caused by abnormal amyloid deposition. LA most commonly manifests as highly pruritic lichenoid papules on the anterior tibia bilaterally. It is the most prevalent form of primary localized cutaneous amyloidosis; the other subtypes are macular, nodular, and familial.

2020年12月9日 · Amyloidosis is a generic term that signifies the abnormal extracellular tissue deposition of one of a family of biochemically unrelated proteins that share certain characteristic staining...

Lichen amyloidosis, a cutaneous form of amyloidosis, is most commonly observed in adults and is characterized by intensely pruritic, hyperkeratotic papules that may form plaques, often in response to chronic friction or trauma.

Lichen amyloidosis is the most common variant of primary cutaneous amyloidosis (PCA) and is associated with the extracellular deposition of amyloid in the skin without associated internal organ involvement. 1 The amyloid deposits in PCA are keratinocyte-derived, primarily composed of keratinocyte 5. Most cases of PCA have been described in ...

The two primary cutaneous amyloidoses lichen and macular amyloidosis show similar histological features and so are described together. Histology of primary cutaneous amyloidosis. The scanning power view of primary cutaneous amyloidosis can be relatively unremarkable (figure 1).