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Query: UMLS:C0038454 (stroke)
 147,016 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Stings by the imported fire ant almost always lead to dermal wheal and flare reactions followed by sterile pustules at sting sites. Less commonly, large local dermal reactions, pyoderma, anaphylaxis, or neuropathy may occur. Such reactions have previously been associated with contact with the insects out of doors. We present two previously unreported cases of indoor attacks on individuals by imported fire ants. One patient experienced a cerebrovascular accident in association with the attack, whereas the second patient had no obvious sequelae. With those two reports, a total of four such indoor massive sting episodes have appeared in the recent medical literature. Physicians and other individuals living in areas indigenous to the fire ant should be aware that infestation of buildings with fire ants may be associated with attacks on human beings indoors. Individuals with cognitive dysfunction seem to be especially at risk for attacks by fire ants.
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PMID:Medical consequences of multiple fire ant stings occurring indoors. 818 26

A technic is described for the demonstration of lymphatic capillaries in living skin and for their study. By means of vital dyes injected intradermally these vessels can be rendered plainly visible. They form an extraordinarily abundant anastomotic web. The least scratch, one which does not penetrate through the epidermis, gives rise to such conditions that lymphatic absorption readily takes place from the abraded surface; and so close-meshed is the lymphatic web that an intradermal injection with even the finest hypodermic needle tears some of the constituent vessels open with result that they undergo direct injection. In many individuals much of the fluid introduced at an ordinary intradermal injection, like that made in the clinic, spreads through the superficial lymphatic network, whereas in others it tends to enter the deeper lymphatics at once, the difference being due to merely physical factors determined by skin texture. Normal flow along the skin lymphatics is rapid even when the body is at rest, dye introduced into the skin of the resting forearm reaching the axilla within a few minutes. The observations make plain the fact that every intradermal injection is an intralymphatic one, often preponderantly such, while furthermore every local injection into the skin becomes within a few minutes a general one, so rapidly is the introduced material transported to the blood. The normal permeability of the skin lymphatics of man is approximately the same as that of the mouse. Tests indicate that in both instances the lymphatic wall behaves like a semipermeable membrane. The permeability of the human lymphatic wall like that of the mouse is subject to rapid and great changes. A stroke on the skin with a blunt instrument to produce a wheal, causes the lymphatic capillaries to become so permeable temporarily that dyes pass through their walls as if practically no barrier existed, instead of being held back for a greater or less period. Slight inflammation due to heat, ultraviolet light or bacterial products has a similar effect. So, too, has histamine. When fluid pours rapidly into the tissue from the blood, as when a wheal is formed, the lymphatics are compressed and their efficiency as drainage channels is interfered with. These facts are briefly discussed in their bearing upon skin phenomena in general. The lymphatics cannot be disregarded in considering such phenomena, in which it is plain that they have a large share.
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PMID:THE LYMPHATIC PARTICIPATION IN HUMAN CUTANEOUS PHENOMENA : A STUDY OF THE MINUTE LYMPHATICS OF THE LIVING SKIN. 1987 Jan 60

Various manifestations after bee sting have been described. Local reactions, such as pain, wheal, flare, edema and swelling, are common and generally self-limiting. Uncommonly manifestations like vomiting, diarrhea, dyspnea, generalized edema, acute renal failure, anaphylactic shock, myocardial infarction, hypotension, collapse, pulmonary hemorrhage, acute hemorrhagic pancreatitis, and atrial fibrillation may occur. We report a 59 year-old man who sustained ischemic stroke and multi-organ dysfunction following multiple bee stings.
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PMID:Acute ischemic stroke and severe multiorgan dysfunction due to multiple bee stings. 2785 93

We present a 38-year-old woman with local heat urticaria confirmed by heat provocation testing. Heat urticaria is a rare form of physical urticaria that istriggered by exposure to a heat source, such as hot water or sunlight. Although it is commonly localized and immediate, generalized and delayed onset forms exist. Treatment options include antihistamines and heat desensitization. A brisk, mechanical stroke elicited a linear wheal. Five minutes after exposure to hot water, she developed well-demarcated,erythematous blanching wheals that covered the distal forearm and entire hand.
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PMID:Local heat urticaria. 2944 56