Lesions
Lesions
Lesions (/lɛʒənz/; from the Latin laesio, "injury") are any abnormality in the tissue of an organism, usually caused by disease or trauma. Lesions can occur in plants as well as animals. In human medicine, they are broadly classified as either benign (non-cancerous) or malignant (cancerous).
Types of Lesions
There are several types of lesions, which can be categorized based on their cause, location, and nature. Some of the most common types include:
- Ulcer: An open sore on an external or internal surface of the body, caused by a break in the skin or mucous membrane that fails to heal.
- Abscess: A closed lesion containing pus, a thick fluid containing dead tissue, bacteria, and white blood cells.
- Tumor: An abnormal mass of tissue that forms when cells grow and divide more than they should or do not die when they should.
- Cyst: A closed sac, having a distinct membrane and division compared to the nearby tissue.
- Blisters: A small pocket of body fluid (lymph, serum, plasma, blood, or pus) within the upper layers of the skin, typically caused by forceful rubbing (friction), burning, freezing, chemical exposure or infection.
Causes of Lesions
Lesions can be caused by a wide range of factors, including:
- Infection: Bacterial, viral, fungal, and parasitic infections can all lead to lesions.
- Inflammation: This is a response by the body's immune system to infection or injury, and it can cause lesions in the affected area.
- Neoplasia: This is the process of abnormal and uncontrolled cell growth, which can lead to the formation of tumors and other types of lesions.
- Trauma: Physical injury can cause a variety of lesions, from cuts and bruises to more serious conditions like burns and fractures.
Diagnosis and Treatment
The diagnosis of lesions typically involves a physical examination, medical history, and in some cases, further diagnostic tests such as a biopsy. Treatment will depend on the cause, location, and nature of the lesion, but may include medication, surgery, or other therapeutic interventions.
External links
- Medical encyclopedia article on Lesions
- Wikipedia's article - Lesions
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