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Intravital Microscopy of the Inguinal Lymph Node
Published on: April 4, 2011
Peritoneal fine structure of inguinal hernia: a scanning electron microscope study
A F Baradi1, J H Heslop, N S Rao
1Department of Anatomy, Otago Medical School, Dunedin, New Zealand.
Abstract:
Mesothelial cells of the normal human peritoneum of the anterior abdominal wall are covered with numerous surface microvilli. These cells become partially denuded inside the sacs of direct and indirect inguinal hernias and so lose the protective property the microvillar covering may impart on them. These mesothelial cells of hernial sacs also acquire an extensive surface coat of fibrin-like material, presumably due to the loss of that protective property, which may as a result subject them to adhesions. There is a considerable collagen build-up in the subserosal fibrous tissue of sacs of both direct and indirect inguinal hernias. Such a build-up is at variance with the accepted current surgical concept which suggests a defect in collagen synthesis, rather than a build-up, as the cause of direct hernia.
Insights
Mesothelial cells in inguinal hernias lose protective microvilli, leading to fibrin buildup and potential adhesions. Collagen accumulation in hernia sacs challenges current surgical theories on direct hernia causes.
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.
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