Magnan's sign

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Magnan's sign

Magnan's sign is a clinical sign in which people with cocaine addiction experience paraesthesia which feels like a constantly moving foreign body, such as fine sand or powder, under the skin. [1]

A medical sign is an objective indication of some medical fact or characteristic that may be detected by a patient or anyone, especially a physician, before or during a physical examination of a patient. For example, whereas a tingling paresthesia is a symptom, erythema is a sign. Symptoms and signs are often nonspecific, but often combinations of them are at least suggestive of certain diagnoses, helping to narrow down what may be wrong. In other cases they are specific even to the point of being pathognomonic.

Cocaine dependence is a psychological desire to use cocaine regularly. Cocaine overdose may result in cardiovascular and brain damage, such as: constricting blood vessels in the brain, causing strokes and constricting arteries in the heart; causing heart attacks.

Foreign body any object originating outside the body of an organism

A foreign body (FB) is any object originating outside the body of an organism. In machinery, it can mean any unwanted intruding object.

The sign is named after Valentin Magnan.

Magnan's sign at Who Named It?

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References

  1. Magnan's sign at Mondofacto online medical dictionary