Lesion

A lesion is a non-specific term referring to abnormal tissue in the body. It can be caused by any disease process including trauma (physical, chemical, electrical), infection, neoplasm, metabolic and autoimmune.

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Not all lesions require treatment.

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Lesions can also be inflicted intentionally during surgery, for example to specific regions of the brain to treat epilepsy.

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Lesion is derived from a Latin word which means "injury."

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Tissue: The word tissue has several meanings:...

Trauma: Trauma can represent:...

Infection: :"Infection" is also the title of an episode of the television series Babylon 5...