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Hollenhorst plaques may cause retinal occlusion, where the plaque blocks blood flow through the retinal vessels, resulting in temporary or permanent vision loss in the affected eye. [1] However, while Hollenhorst plaques do become lodged in retinal arteries, they generally do not fully prevent blood flow so do not cause ischemia. [1] Once a ...
Cotton wool spots are also associated with giant cell arteritis (GCA), a type of inflammation of the lining of the arteries, as this may reduce blood flow to the eyes. [1] In a study of 123 subjects with vision loss due to early stage giant cell arteritis, one-third of subjects had cotton wool spots present in their eyes. [2]
A rare development is amyloid purpura, a susceptibility to bleeding with bruising around the eyes, termed "raccoon-eyes". Amyloid purpura is caused by amyloid deposition in the blood vessels and reduced activity of thrombin and factor X , two clotting proteins that lose their function after binding with amyloid.
Acne symptoms and signs. Acne blemishes are most common on the face, chest, back, shoulders and neck, but they can appear almost anywhere. With acne, you might have pimples, blackheads, papules ...
What it looks like: The most recognizable reaction on this list is the bullseye rash—a large, red, target-like rash that signals the early stages of Lyme disease from the bite of an infected ...
There is a very high risk of dysplasia, transformation to squamous cell carcinoma with high mortality (PVL does not transform into verrucous carcinoma, which is a lesion with a good prognosis usually; the similarity of names does not reflect the common origin, but only the resemblance of their appearance).
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Human eyes are somewhat distinctive in the animal kingdom in that the sclera is very plainly visible whenever the eye is open. This is not just due to the white color of the human sclera, which many other species share, but also to the fact that the human iris is relatively small and comprises a significantly smaller portion of the exposed eye ...