Nodular mesothelial hyperplasia in hernia sacs: a benign reactive condition simulating a neoplastic process

Area of Science:

• Surgical Pathology
• Histopathology
• Oncology

Background:

• Hernia sacs can undergo reactive changes.
• Mesothelial hyperplasia is a known reactive process.
• Distinguishing reactive hyperplasia from malignancy is critical in pathology.

Purpose of the Study:

• To present cases of hernia sacs with marked mesothelial hyperplasia.
• To highlight features that can mimic a malignant process.
• To emphasize diagnostic clues for correct identification.

Main Methods:

• Retrospective review of 13 hernia sac cases.
• Histopathological examination of atypical mesothelial cell proliferation.
• Correlation of microscopic findings with clinical history.

Main Results:

• 13 cases (infants, children, adults) with inguinal/epigastric hernias.
• 52% of cases had a history of trauma or incarceration.
• Microscopy revealed atypical mesothelial cells, mitoses, multinucleated cells, and 'strap cells'.

Conclusions:

• Marked mesothelial hyperplasia in hernia sacs can be mistaken for malignancy.
• Cytologic features and changes in the hernia sac lining are key diagnostic indicators.
• Accurate histopathological assessment is essential to avoid misdiagnosis.