GROSS ANATOMY
PELVIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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S1
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L5
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Sz
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Cox 1
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Detailed explanation-1: -The adult human rectum is about 12 centimetres (4.7 in) long, and begins at the rectosigmoid junction (the end of the sigmoid colon) at the level of the third sacral vertebra or the sacral promontory depending upon what definition is used.
Detailed explanation-2: -The rectosigmoid junction (RSJ) is the limit between the sigmoid colon and the rectum. The limits of this transition zone have been a source of controversy. There are multiple definitions that aim to establish the beginning of the rectum.
Detailed explanation-3: -The S-shaped section of the colon that connects to the rectum.
Detailed explanation-4: -According to UICC TNM classification, the rectosigmoid junction in rectal tumor has been described as the distance from the anal verge during rigid proctoscopy of below 16 cm [37]. Other endoscopic definitions have been purposed: below 15 cm [22] or below 12 cm [20].