Information about Lesion
Lesion is derived from the Latin word "laesio" which means "injury."
A lesion is any abnormal tissue found on or in an organism, usually damaged by disease or trauma.
Lesions are sometimes intentionally inflicted during neurosurgery, such as the carefully-placed brain lesion used to treat epilepsy and other brain disorders.
Note that lesions are not limited to animals or humans; damaged plants are said to have lesions.
An additional classification that is sometimes used is based on whether or not a lesion occupies space. A space occupying lesion, as the name suggests, occupies space and may impinge on nearby structures, whereas a non space occupying lesion is simply a hole in the tissue, e.g. a small area of the brain that has turned to fluid following a stroke.
Some lesions have specialized names, like the Gohn lesions in the lungs of tuberculosis victims. The characteristic skin lesions of a varicella-zoster virus infection are called chickenpox. Lesion of the teeth are usually called dental caries.
Finally, they are often classified by their location. For example, compare a 'skin lesion' versus a 'brain lesion'.
A lesion is any abnormal tissue found on or in an organism, usually damaged by disease or trauma.
Causes of lesions
Lesions are caused by any process that damages tissues. A cancerous tumor is an example of a lesion, however the surrounding tissue damaged by a tumour is also a lesion. Trauma, including electrocution and chemical burns cause lesions. Certain diseases present lesions, for example the skin deformities caused by chicken pox. Lesions can also be caused by metabolic processes, like an ulcer or autoimmune activity, as in the case with many forms of arthritis.Lesions are sometimes intentionally inflicted during neurosurgery, such as the carefully-placed brain lesion used to treat epilepsy and other brain disorders.
Note that lesions are not limited to animals or humans; damaged plants are said to have lesions.
Types of lesions
Because the definition of lesion is so broad, the varieties of lesions are virtually endless. They are subsequently classified by their features. If a lesion is caused by cancer it will be classified as malignant versus benign. They may be classified by the shape they form, as is the case with many ulcers which appear like as a bullseye or 'target'. Their size may be specified as gross or histologic depending on if they are visible to the unaided eye or if they require a microscope to see.An additional classification that is sometimes used is based on whether or not a lesion occupies space. A space occupying lesion, as the name suggests, occupies space and may impinge on nearby structures, whereas a non space occupying lesion is simply a hole in the tissue, e.g. a small area of the brain that has turned to fluid following a stroke.
Some lesions have specialized names, like the Gohn lesions in the lungs of tuberculosis victims. The characteristic skin lesions of a varicella-zoster virus infection are called chickenpox. Lesion of the teeth are usually called dental caries.
Finally, they are often classified by their location. For example, compare a 'skin lesion' versus a 'brain lesion'.
See also
External Links
Brain Lesion Locator Diagnosis of Brain Lesions Physical trauma refers to a physical injury. A trauma patient is someone who has suffered serious and life-threatening physical injury potentially resulting in secondary complications such as shock, respiratory failure and death.
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MeSH D001168 Arthritis (from Greek arthro-, joint + -itis, inflammation; plural: arthritides) is a group of conditions where there is damage caused to the joints of the body. Arthritis is the leading cause of disability in people over the age of 55.
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Neurosurgery is the surgical discipline focused on treating those central, peripheral nervous system and spinal column diseases amenable to mechanical intervention.
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Definition and scope
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Epilepsy
Classification & external resources
ICD-10 G 40. -G 41.
ICD-9 345
DiseasesDB 4366
MedlinePlus 000694
eMedicine neuro/415
MeSH D004827
Epilepsy
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Classification & external resources
ICD-10 G 40. -G 41.
ICD-9 345
DiseasesDB 4366
MedlinePlus 000694
eMedicine neuro/415
MeSH D004827
Epilepsy
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An ulcer (from Latin ulcus) is an open sore of the skin, eyes or mucous membrane, often caused, but not exclusively, by an initial abrasion and generally maintained by an inflammation, an infection, and/or medical conditions which impede healing.
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A bullseye is the center of a target of concentric circles.
Bullseye may also refer to:
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Bullseye may also refer to:
- ʘ, a phonetic symbol for bilabial click
- Bullseye (CNBC), U.S.
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Ablation is defined as the removal of material from the surface of an object by vaporization, chipping, or other erosive processes. The term occurs in space physics associated with atmospheric reentry, in glaciology, medicine and passive fire protection.
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