DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Gallstones. X-ray of gallstones (pale circles, upper centre) in a patient's upper abdomen. Gallstones are bodies formed by the hardening of deposits of cholesterol and bile salts. The stones lead to attacks of extreme pain in the abdomen after fatty meals. Treatment can be non-invasive (broken down by drugs or ultrasound) or invasive (surgical removal).
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