SPIGELIAN HERNIA CONTAINING SIGMOID COLON

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Abstract
Spigelian hernias containing sigmoid colon may develop in the left lower quadrant through thelateral aspect of the abdominal wall at a point of weakness, the linea semicircularis of Douglas. They present clinically with a palpable, somewhat superficial, left lower quadrant mass. Barium enema study demonstrates the hernia and 2 findings diagnostic of its type: the sharp pressure defect produced upon the upper loop of the herniated sigmoid by the combined aponeurosis of the internal oblique and the transversus muscles which constitute the upper margin of the neck; and the interstitial nature of the hernia separating the external oblique muscle from the internal oblique muscle on roentgenograms made with the soft tissue technique.

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