Unusual Types of Interparietal Hernia

AMA Arch Surg. 1955;71(5):723-726. doi:10.1001/archsurg.1955.01270170081016.
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It is well known that indirect inquinal hernias generally come through the internal inquinal ring, follow the inguinal canal downward, and emerge through the external inguinal ring, often becoming scrotal in character. The cases here reported did not follow that pattern at all. In the first case a huge hernia emerged through the internal ring and then pushed itself directly through the abdominal wall, including the aponeurosis of the external oblique muscle, and gave the appearance of being a ventral hernia. In the second case a strangulated hernia came through the internal ring, dissected upward between the internal and external oblique muscles but did not pierce the aponeurosis of the external oblique, as the first one did.

These hernias come in the category of interparietal hernias. Lower and Hicken1 classify interparietal hernias anatomically as follows: "(1) Properitoneal hernia, that type in which the hernial sac lies between the peritoneum


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