Amyloid is a proteinaceous material that is deposited in the tissues in a large variety of clinical contexts; in the skin it can be found with or without concomitant systemic disease. Primary localized cutaneous amyloidosis encompasses those amyloidoses restricted to the skin without involvement of other systems. The most common forms within this group are macular and lichen amyloidosis. Nodula...

Amyloidosis consists of approximately 30 protein-folding disorders in which a specific soluble precursor protein aggregates to form the insoluble fibrils amyloid. Insulin is hypothesized localized cutaneous insulin-derived (AIns) amyloidosis. Amyloid deposition at insulin injection sites can interfere with absorption, leading poor glucose control. Despite increasing prevalence diabetes mellitus...

Background: A rippled type of pigmentation is observed on the arms, forearms, and bony prominences, more commonly in women with a history of chronic rubbing. The terminology (commonly referred to as frictional melanosis) and its relation with cutaneous amyloidosis has been debated. Materials and Methods: Twenty one patients with pigmented skin lesions with manifestations suggestive of frictiona...

Journal Compilation © 2009 Acta Dermato-Venereologica. ISSN 0001-5555 Sir, Lichen amyloidosis, a variant of localized cutaneous amyloidosis, is characterized by discrete, intensely pruritic, hyperkeratotic brown-coloured papules and plaques (1). Genetic and viral factors, as well as chronic friction due to scratching, are possible causes (2–4). Therapeutic management of lichen amyloidosis compr...

Cutaneous and systemic plasmacytosis (CSP) is a rare disorder of unknown etiology characterized by cutaneous polyclonal plasma cell infiltrates associated with various extracutaneous involvement and polyclonal hypergammaglobulinemia. Here, we report on a 54-year-old male patient with chronic renal insufficiency who presented with disseminated reddish-brown macules and plaques on the face and tr...

A case of facial primary nodular cutaneous amyloidosis is reported. This illustrates: the striking appearance of this unusual condition; the investigations appropriate to establish the diagnosis and to exclude underlying systemic amyloidosis or a condition which might contribute to amyloidosis; and the difficulty of successful management. Initial investigation failed to reveal any evidence of s...

Amyloidosis cutis dyschromia is a rare form of primary cutaneous amyloidosis. Amyloid deposition in the skin occurs without systemic manifestations and produces hypopigmented and hyperpigmented macules. A 19-year-old woman is presented with progression of this condition over 16 years.