Horizontally placed sigmoid mesocolon and a redundant loop of sigmoid colon filling the pelvic cavity

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The sigmoid colon, when longer than its usual length is known as dolichosigmoid or redundant sigmoid colon. In the present case, the redundant sigmoid colon was about 20” long, and its distal part was “M” shaped. Its mesocolon was having a short 3” root attached to first sacral vertebral segment horizontally with the absence of its usual right and left limbs. The extra length of the sigmoid colon and atypical attachment of its mesocolon may favor the volvulus formation. Such variation may also cause constipation and pose difficulty in radiological diagnosis and instrumentation, making it clinically and surgically important.