SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Not for use in Television.
Kidney stones that have been removed from a patient. Kidney stones, or calculi are formed when mineral salts, most often involving calcium, accumulate on the inner surfaces of the kidney. As they grow they may block the flow of urine out of the kidney, causing extreme pain. There are many different causes, including dehydration, infection and metabolic disorders. Most stones are small enough to be passed in the urine, but larger stones need to be treated.
Model release not required. Property release not required.