What Is Renal Cyst

Renal Cyst is a general term for the various cystic masses in the kidneys, and it can be divided into three kinds, namely, Simple Renal Cyst, Adult Polycystic Kidney Disease(APKD) and Acquired Renal Cystic Disease (ARCD). What are their specific characteristics and how do they occur?
I. Simple Renal Cyst
Simple Renal Cyst is a kind of congenital abnormal in one or two kidneys. There may appear one or several round bursal lumens with different size in the kidneys, and they are isolated with other tissues of the body.
This is a kind of commonly seen cystic kidney disease different with polycystic kidney disease, and it is postnatal rather than inherited. Recently study regards it as a consequence of the diverticulum of renal tubule, while the previous study showed it was caused by focal ischemia.
The morbidity of Simple Renal Cyst increases with age, and up to 27% of individuals greater than 50 years of age may have simple renal cysts that cause no symptoms.
II. Adult Polycystic Kidney Disease (APKD)
APKD is usually an inherent disease which is symbolized by various cysts in the renal parenchyma with liquid in them. The cysts can be small in size or large in centimeters. In addition, the quantity of the cysts is not fixed, which lead the disease complex.
Patients with APKD are likely to suffer from nocturia, low back pain, high blood pressure and so on. With the abnormal in their urine and protein quantity, the disease can develop into chronic renal failure gradually. 10% of them may get kidney stone while 30% of them are at high risk of polycystic liver.
III. Acquired Renal Cystic Disease (ARCD)
ARCD always occur after the patients have got Uremia and have accepted dialysis for three years or so. It can be regarded as a complication of the kidney disease. Patients with ARCD are easily to get infected and even get a kidney cancer. Therefore, it is very important for them to take timely treatment and to control the disease.
The three kinds of renal cysts have different causes with the same manifestation, and the treatment for them can be varies. For this reason, it is necessary for the patients to know which kind their disease belongs to after being diagnosed.