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Morphometrical evaluation of acute leukemic cells by electron microscopy. Discrepancy between morphological
Virchows Archiv. B, Cell Pathology Including Molecular Pathology
|January 1, 1987
Summary
Electron microscopy revealed significant morphometric differences between acute lymphocytic leukemia (ALL) and acute myelogenous leukemia (AML) cells. However, these distinctions were less apparent among subtypes defined by light microscopy, highlighting microscopy
Area of Science:
- Hematology
- Cell Biology
- Medical Imaging
Background:
- Acute leukemia is broadly classified into lymphocytic (ALL) and myelogenous (AML) types.
- The French-American-British (FAB) classification uses light microscopy to categorize subtypes.
- Morphometric analysis can provide quantitative insights into cellular structures.
Purpose of the Study:
- To compare nuclear and cytoplasmic features of ALL and AML cells using electron microscopy.
- To correlate electron microscopic findings with FAB classification subtypes.
- To investigate discrepancies between light and electron microscopic morphometry.
Main Methods:
- Transmission electron microscopy was used to examine leukemic cells from 39 patients.
- Computer-controlled image analysis measured nuclear and cytoplasmic areas, heterochromatin, euchromatin, and nucleoli.
- Morphometric parameters were compared between ALL and AML, and among FAB subtypes.
Main Results:
- ALL cells exhibited a larger nucleus-to-cell ratio and more heterochromatin compared to AML cells.
- Electron microscopy did not confirm light microscopy-based distinctions between L1 and L2 subtypes (cytoplasm width).
- Significant differences in nucleus/cell ratio and heterochromatin/euchromatin ratio were noted among some AML subtypes (M3 vs. M1/M2/M4, M5 vs. M1/M2/M3).
Conclusions:
- Electron microscopic morphometry clearly differentiates between ALL and AML.
- Morphometric differences among FAB subtypes are less pronounced when analyzed by electron microscopy.
- Electron microscopy offers distinct quantitative data compared to light microscopy for leukemia subtyping.