What does "Sigmoid colon" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
The sigmoid colon is a part of the large intestine, which is the last part of the digestive system. It is shaped like an 'S' or a loop, which is why it's called 'sigmoid', a term derived from the Greek letter 'sigma' which is similar in shape. This part of the intestine is responsible for storing the body's waste until it's ready to be expelled. It's located just before the rectum, which is the final section of the large intestine.
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