A cyst is a closed cluster of cells forming a sac that is surrounded by a membrane. The cells in this membrane are different in appearance and behaviour from the surrounding cells in that location. Cysts contain air, fluids, or semi-solid material and they can be formed from normal, abnormal, non-neoplastic or neoplastic tissues.
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Research Highlights |Nature Reviews Nephrology 7, 676
Research Highlights |Nature Reviews Nephrology 7, 424