👉 Percystic is a medical term used to describe an enlarged, fluid-filled cyst in the kidney. These cysts can be caused by various factors such as infection or inflammation, and they are often associated with symptoms of proteinuria (high blood pressure), glomerulonephritis (inflammation of the kidneys), and chronic kidney disease. Percysts are typically found in the descending collecting duct from the renal artery. They may also occur in other areas of the body such as the