Radiopaedia.org, Nature.com and NIDDK.nih.gov provide diagrams of kidney cysts, which are also known as renal cysts. Additional diagrams can be found at AJPrenal.Physiology.org and WiseGeekHealth.com.
Radiopaedia.org, which is geared toward medical professionals, diagrams the Bosniak classification of renal cysts. This system orders cysts according to level of malignancy. The diagrams depict cysts that range from 0 percent to around 100 percent malignancy.
The peer-reviewed medical journal "Nature Clinical Practice Nephrology" on Nature.com offers a diagram illustrating normal versus abnormal kidney development. It depicts a normal kidney, a hypoplastic kidney, a cystic dysplastic kidney and a multicystic dysplastic kidney. Insets feature close-up views of the layers of nephrons that make up the kidney wall. The figure serves to diagram normal and abnormal growth pathways for kidneys.
The National Institute of Diabetes and Digestive and Kidney Diseases provides a diagram of renal cysts that demonstrates how cyst-covered kidneys become enlarged, but retain a general kidney shape. The American Journal of Physiology - Renal Physiology illustrates an article on the cystogenic properties of ouabain with a diagram that includes a close-up of a polycystic nephron, a unit that enables kidneys to filter waste. It also offers an enlarged diagram of a cyst to help explain how it proliferates. Additional diagrams of polycystic kidney disease offer explanations of the impact of ouabain on kidney cell function. A simple color diagram on WiseGeekHealth.com features a normal kidney alongside one affected by polycystic kidney disease.