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Which stage of renal cysts are you in?

Which stage of  renal cysts are you in?88888888.jpg

renal cysts are rarely symptomatic, though if large enough they can cause flank pain. Most renal cysts are found incidentally when imaging the abdomen for problems unrelated to the kidneys. Because renal cysts are so often discovered on abdominal CT scans, a system for grading renal cysts based on their CT appearance was developed. This system is known as the Bosniak classification, and it divides cysts into 4 categories based on their likelihood of being or becoming malignant. One of the many criteria used in the Bosniak system is whether the cyst becomes enhanced when a contrast dye is injected into the patient's vasculature just prior to CT imaging. If the cyst does become enhanced, this indicates that the cyst has its own vasculature and so is more likely a malignant cyst. The 4 categories are defined as follows:

Category I - A benign, simple cyst with very thin wall. Does not contain septa, calcifications, or solid material. The cyst has a density similar to that of water and it does not become enhanced after contrast dye is injected.

Category II - A benign cyst that contains a few thin septa. Fine calcifications exist in the wall or septa. Also includes uniformly attenuated (whiter than water on CT) lesions less than 3 cm that have sharp edges and do not enhance with contrast dye (do not have their own vasculature).

Category IIF - Wall defined cyst with sharp edges and multiple septa that may or may not show thickening or enhancement when contrast is given. There are no enhancing soft tissue components. Calcifications may be thick and nodular. Also includes uniformly attenuated (whiter than water on CT) lesions greater than 3 cm that have sharp edges and do not enhance with contrast dye.

Category III - An indeterminate cystic mass with thickened, irregular walls and septa that enhance when contrast is given.

Category IV - Malignant cystic masses that have all the characteristics of category III as well as soft tissue components that enhance when contrast is given.

Article URL : http://www.sjzhospital.com/faq/2503.html

Article by : Shijiazhuang Kidney Disease Hospital

TAG:stages,renal cysts

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