Lesion

A lesion is a localized area of damage or dysfunction in a tissue or organ. It can be caused by various factors including injury, disease, or abnormal development. Lesions can manifest in a wide range of forms and sizes, from microscopic cellular changes to large, visible growths or ulcers. The term is used across many medical and scientific fields to describe a range of abnormalities, including wounds, ulcers, tumors, and even subtle disruptions in neurological or cognitive function. Lesions are often classified based on their cause, appearance, and location, which helps in diagnosis and treatment planning. Detailed examination of lesions, which might involve imaging or biopsy, is often required to determine the underlying pathology and its clinical significance.

Lesion meaning with examples

• A traumatic brain injury can result in a cerebral lesion, potentially causing cognitive and motor impairments. Neuroimaging techniques like MRI are used to visualize the extent of brain damage after the accident and evaluate patient’s chances of recovery.
• Skin lesions, such as those caused by psoriasis, can present as inflamed patches of skin. Dermatologists examine the skin to distinguish benign rashes from potentially cancerous lesions, employing treatments to manage symptoms.
• A suspicious lung lesion identified on a chest X-ray might require further investigation, including a biopsy to rule out the presence of a tumor or infection. Regular screenings and prompt medical attention are essential for a diagnosis.
• During a colonoscopy, a gastroenterologist may identify and remove precancerous lesions called polyps in the colon. This preventative measure can reduce the risk of colorectal cancer.