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.
Not all lesions require treatment.
Lesion is derived from a Latin word which means "injury."
Researchers using lesion methods damage, destroy, or remove a particular part of a laboratory animal’s brain....
After a person is infected with the smallpox virus, about 12 days pass before the person begins to feel sick, a time known as the incubation period....