Are Renal Cyst and Kidney Cyst Same? Renal cysts are fluid sacs formed in the kidneys. They are generally distinguished as “simple” cysts, which means that they have a thin wall and contain fluid like water. Kidney Cysts become fairly usual as people age and generally don’t cause symptoms or harm. Read full details at : https://medium.com/@kidneyayurveda/are-renal-cyst-and-kidney-cyst-same-83f3d184c093