Foods that have roughly the same number of calories from fats, calories, and protein will be found closer to the center of the pyramid. Read more about the Caloric Ratio Pyramid. Caloric Ratio Pyramid for Grapefruit, raw, pink and red, all areas. This feature requires Flash player to be installed in your browser.
Causes of Pleural Thickening. Pleural thickening is a condition of the lungs that is most often caused by the long term exposure and inhalation of asbestos particles which then settle on the pleura, or pleural membrane (the thin area surrounding the lungs) causing the area to thicken, calcify and/or scar.
Causes of pleurisy include: 1  A viral infection, such as the flu (influenza) 2  A bacterial infection, such as pneumonia. 3  A fungal infection.  Autoimmune disorder, such as rheumatoid 1  arthritis. Certain medications.  Lung cancer near the pleural 1  surface. Rib fracture.  Certain inherited diseases, such as sickle cell disease.