Pigmentary purpuric eruptions
Encyclopedia
Pigmented purpuric dermatosis (also known as "progressive pigmentary dermatosis," "purpura pigmentosa chronica," "pigmentary purpuric eruptions," or "progressive pigmenting purpura") refers to one of the three major classes of skin conditions characterized by purpuric skin eruptions.
Pigmented purpuric dermatosis are distinguished from other purpura
by size (0.3-1 cm) and are most often seen in the lower extremities. Pigmentary purpuric eruptions may present with one of several clinical patterns. There may be overlapping characteristics among pigmented purpuric dermatosis and between their signs and those of other purpuric eruptions. Examples of the pigmented purpuric dermatosis group include:
Although vascular damage may be present, it is insufficient for these conditions to be considered forms of vasculitis
.
Pigmented purpuric dermatosis are distinguished from other purpura
Purpura
Purpura is the appearance of red or purple discolorations on the skin that do not blanch on applying pressure. They are caused by bleeding underneath the skin...
by size (0.3-1 cm) and are most often seen in the lower extremities. Pigmentary purpuric eruptions may present with one of several clinical patterns. There may be overlapping characteristics among pigmented purpuric dermatosis and between their signs and those of other purpuric eruptions. Examples of the pigmented purpuric dermatosis group include:
- Schamberg's disease
- Majocchi's diseaseMajocchi's diseaseMajocchi's disease is a skin condition characterized by bluish-red 1- to 3-cm annular patches composed of dark red telangiectases with petechiae.- See also :...
(Purpura annularis telangiectodes) - Gougerot-Blum syndrome (Pigmented purpuric lichenoid dermatitis)
- Ducas and Kapetanakis pigmented purpuraDucas and Kapetanakis pigmented purpuraDoucas and Kapetanakis pigmented purpura is a skin condition characterized by scaly and eczematous patches, which also have petechiae and hemosiderin staining.It is also known as "eczematoid purpura" or "eczematoid-like purpura"....
- Lichen aureusLichen aureusLichen aureus is a skin condition characterized by the sudden appearance of one or several golden or rust-colored, closely packed macules or lichenoid papules....
Although vascular damage may be present, it is insufficient for these conditions to be considered forms of vasculitis
Vasculitis
Vasculitis refers to a heterogeneous group of disorders that are characterized by inflammatory destruction of blood vessels. Both arteries and veins are affected. Lymphangitis is sometimes considered a type of vasculitis...
.