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Frozen section diagnosis of cytomegalovirus infections
Abstract:
We studied the standard frozen section as a diagnostic method for cytomegalovirus infection of the lung in bone marrow transplant recipients. Fifty-nine patients with cytomegalovirus pneumonia diagnosed by open lung biopsy were studied. The sensitivity of frozen section was compared with that of paraffin section, cytology of imprints prepared from the tissue sample, and viral culture. Fifteen percent of the cases were diagnosable at frozen section alone, and 44% by cytology alone. This confirms our previous study and indicates that frozen section unaided by more specific indentification methods provides low sensitivity even in cytomegalovirus-infected cells, which probably show the most easily identified cytopathic effects of any virus. This low sensitivity underscores the need for the additional sensitivity and specificity which may be contributed by immunolabeling techniques to rapid viral diagnosis.
Insights
Standard frozen section is a poor diagnostic method for cytomegalovirus (CMV) pneumonia in bone marrow transplant recipients. Cytology alone offers better sensitivity for rapid CMV diagnosis.
Area of Science:
- Medical Microbiology
- Transplant Immunology
- Pulmonary Medicine
Background:
- Cytomegalovirus (CMV) pneumonia is a significant complication in bone marrow transplant (BMT) recipients.
- Rapid and accurate diagnosis of CMV pneumonia is crucial for timely treatment and improved patient outcomes.
Purpose of the Study:
- To evaluate the diagnostic sensitivity of standard frozen section for CMV lung infection in BMT patients.
- To compare the efficacy of frozen section with other diagnostic methods, including paraffin section, cytology, and viral culture.
Main Methods:
- Retrospective analysis of 59 BMT recipients diagnosed with CMV pneumonia via open lung biopsy.
- Comparison of diagnostic yield from frozen section, paraffin section, cytology of imprints, and viral culture.
Main Results:
- Frozen section alone diagnosed only 15% of CMV pneumonia cases.
- Cytology of imprints diagnosed 44% of cases, demonstrating higher sensitivity than frozen section.
- The findings confirm the low sensitivity of frozen section, even for easily identifiable viral cytopathic effects.
Conclusions:
- Standard frozen section is insufficiently sensitive for the primary diagnosis of CMV pneumonia in BMT recipients.
- Additional diagnostic methods, such as immunolabeling techniques, are necessary to enhance sensitivity and specificity for rapid viral diagnosis.
- Cytology offers a more sensitive rapid diagnostic option compared to frozen section for CMV lung infections.