SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Kidney cyst. Coloured urogram (X-ray) of the abdomen of a patient with a cyst (far left) on their right kidney (centre). A cyst is a fluid- filled sac. Cysts are quite common within the kidney and fewer than five small cysts will not affect the functioning of the kidney and so are not treated. However, if the condition progresses to polycystic kidney disease it will lead to kidney failure.
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