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Morphometric image analysis and eosinophil counts in human liver allografts
Summary
Histological assessment of liver allografts can be challenging. This study found that quantifying eosinophils in liver biopsies is a specific and sensitive marker for acute cellular rejection, aiding in severity grading.
Area of Science:
- Transplantation immunology
- Graft rejection diagnostics
- Liver pathology
Background:
- Histology is the standard for diagnosing acute cellular rejection in liver allografts.
- Accurate grading of rejection severity and differentiation from other infiltrates remain difficult.
- Previous research suggested eosinophils as potential specific markers for rejection.
Purpose of the Study:
- To quantitate eosinophil counts in liver allograft biopsies.
- To evaluate morphometric image analysis for assessing rejection severity.
- To determine the specificity and sensitivity of eosinophils in diagnosing acute cellular rejection.
Main Methods:
- Quantified eosinophil counts in 92 biopsies from 25 patients.
- Used morphometric image analysis to measure portal tract area and cell density in 30 patients' day 5 protocol biopsies.
- Compared findings with control groups: no rejection, CMV infection, and obscure liver dysfunction.
Main Results:
- Portal tract cross-sectional area, inflammatory cell count, and density increased significantly with rejection severity.
- Eosinophil counts were specific for acute cellular rejection and correlated positively with rejection severity.
- Eosinophils were absent in non-rejection, CMV, and obscure dysfunction groups; counts decreased after treatment.
Conclusions:
- Eosinophil quantification is a specific diagnostic feature for acute cellular rejection in liver allografts.
- Morphometric analysis of portal tracts aids in assessing rejection severity.
- Eosinophils can help differentiate acute cellular rejection from other liver conditions.