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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.
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 ().
The distinctive solid black colour of the Ayam Cemani (rooster shown) chicken breed is due to hyperpigmentation, with the bird's feathers, skin, beak, and internal organs all being affected. Hyperpigmentation can be caused by sun damage, inflammation, or other skin injuries, including those related to acne vulgaris.
Traditionally, necrolytic acral erythema manifests as distinct, dark red hyperkeratotic plaques with a keratotic border that are usually found on the dorsum of the foot and toes. Ankles, legs, and knees may also be affected in some cases. [4] On occasion, lesions may appear on the buttocks, genitalia, hands, and elbows.
They are often found on the distal tibia, ankle, and foot. [14] Clonal seborrheic keratosis: Dull or lackluster surface, and with round, loosely packed nests of cells seen histologically. [2]: 769 Irritated seborrheic keratosis (inflamed seborrheic keratosis, basosquamous cell acanthoma) Dull or lackluster surface. [2]: 769
Rocky Mountain spotted fever is a big part of the 1947 Republic Pictures movie Driftwood, starring Walter Brennan, James Bell, Dean Jagger, Natalie Wood, and Hobart Cavanaugh. [ citation needed ] In December 2013, hockey player Shane Doan was diagnosed with Rocky Mountain spotted fever, and returned to play in January 2014.
A petechia (/ p ɪ ˈ t iː k i ə /; [1] pl.: petechiae) is a small red or purple spot (≤4 mm in diameter) that can appear on the skin, conjunctiva, retina, and mucous membranes which is caused by haemorrhage of capillaries.
Purpura (/ ˈ p ɜːr p jʊər ə / [1]) is a condition of red or purple discolored spots on the skin that do not blanch on applying pressure. The spots are caused by bleeding underneath the skin secondary to platelet disorders, vascular disorders, coagulation disorders, or other causes. [2]
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