Interdisciplinary research at the University of Pennsylvania is showing how cells interact over long distances
within fibrous tissue, like that associated with many diseases of the liver, lungs and other organs.
Mass lesions
within the liver are often identified on ultrasound examination and can represent an area of liver healing (or regenerative nodule in a damaged region), a change in
tissue content caused by storage of glycogen (starch, common in dogs with Cushing's Disease described below), infections (abscesses), biliary cysts, chronic
fibrous tissue secondary to chronic hepatitis, or benign or malignant tumors.