Peritoneal fine structure of inguinal hernia: a scanning electron microscope study.

Area of Science:

• Cell Biology
• Surgical Pathology
• Anatomy

Background:

• Normal human peritoneal mesothelial cells possess microvilli offering protection.
• Inguinal hernia sacs exhibit altered mesothelial cell surface properties.

Purpose of the Study:

• To investigate morphological changes in mesothelial cells within direct and indirect inguinal hernia sacs.
• To examine the subserosal fibrous tissue composition in inguinal hernias.

Main Methods:

• Microscopic examination of mesothelial cells from anterior abdominal wall peritoneum and inguinal hernia sacs.
• Histological analysis of subserosal fibrous tissue in hernia sacs.

Main Results:

• Mesothelial cells in hernia sacs are partially denuded, losing microvilli.
• A fibrin-like material coats mesothelial cells in hernia sacs.
• Significant collagen accumulation is observed in the subserosal fibrous tissue of both direct and indirect inguinal hernia sacs.

Conclusions:

• Loss of microvilli on mesothelial cells may compromise their protective function, potentially leading to adhesions.
• The observed collagen build-up contradicts the prevailing surgical concept of collagen synthesis defects in direct hernias.