What are parenchymal lesions in the lung?!
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The parenchyma are the functional parts of an organ in the body (i.e. the nephrons of the kidney, the alveoli of the lungs, the white and red pulp of the spleen). This is in contrast to the stroma, which refers to the supporting tissue of organs.
An alveolus (plural:alveoli), is an anatomical structure that has the form of a hollow cavity. In the lung, the pulmonary alveoli are spherical outcroppings of the respiratory bronchioles and are the primary sites of gas exchange with the blood. Alveoli are peculiar to mammalian lungs; different structures are involved in gas exchange in other vertebrates.
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.
Lesions can also be inflicted intentionally during surgery, for example to specific regions of the brain to treat epilepsy. In psychology, lesion means inflicting damage to an area of the brain i.e. by burning or cutting, in order to study the effects of disabling this area of the brain.
Lesion is derived from a Latin word which means "injury."
So the short and easy way to say it is, "an injury or disease of the little sacs in the lungs."
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www.meddean.luc.edu/lumen/MedE.
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