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Schamberg's disease, (also known as "progressive pigmentary dermatosis of Schamberg", [1] "purpura pigmentosa progressiva" (PPP), [1] and "Schamberg's purpura" [1]) is a chronic discoloration of the skin found in people of all ages, usually only affecting the feet, legs or thighs or a combination. It may occur as a single event or subsequent ...
Hyperpigmentation can be diffuse or focal, affecting such areas as the face and the back of the hands. Melanin is produced by melanocytes at the lower layer of the epidermis. Melanin is a class of pigment responsible for producing color in the body in places such as the eyes, skin, and hair.
Common areas of occurrence are noted in points of the body that are easily accessible or prone to itchiness, notably the nape of the neck, wrists, hands, forearms, waist, scrotum, vulva, thighs, lower legs and feet. [4] The term lichenification was coined by Louis-Anne-Jean Brocq in 1891, due to the condition’s visual similarity to lichen. [1]
Gougerot–Blum syndrome is a variant of pigmented purpuric dermatitis, a skin condition characterized by minute, rust-colored to violaceous, lichenoid papules that tend to fuse into plaques of various hues.
Majocchi's disease, also known as Purpura annularis telangiectodes of Majocchi [1] is a not-well-recognized and uncommon skin condition characterized by purple/bluish-red 1- to 3-cm annular patches composed of dark red telangiectases with petechiae.
In advanced lipodermatosclerosis the proximal leg swells from chronic venous obstruction and the lower leg shrinks from chronic ulceration and fat necrosis resulting in the inverted coke bottle appearance of the lower leg. [7] Lipodermatosclerosis is most commonly diagnosed in middle-aged women. [3]
Livedo reticularis is a common skin finding consisting of a mottled reticulated vascular pattern that appears as a lace-like purplish discoloration of the skin. [1] The discoloration is caused by reduction in blood flow through the arterioles that supply the cutaneous capillaries, resulting in deoxygenated blood showing as blue discoloration ().
There may be overlapping characteristics among pigmented purpuric dermatosis and between their signs and those of other purpuric eruptions. [1]: 829 Examples of the pigmented purpuric dermatosis group include: [1]: 829–30 Schamberg's disease; Majocchi's disease (Purpura annularis telangiectodes)