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Transmission and scanning electron microscopy findings in 37 patients with monocytic leukemia
Abstract:
The ultrastructural features of the monocytic blast cells of 37 patients with M4 and M5 types of leukemia were examined with transmission (TEM) and scanning (SEM) electron microscopes. The cells showed a large variety in nuclear size and shape, dependent on the stage of cell differentiation. Nuclear pockets, appendices and bridges were observed. The cytoplasm contained perinuclearly located fibrils, occasionally elongated mitochondria and Auer bodies. The surface ultrastructure of the cells was similar to that of healthy monocytes, but often numerous blebs were observed.
Insights
This study examined monocytic blast cells in M4 and M5 leukemia using electron microscopy. Findings reveal unique nuclear and cytoplasmic features, with surface structures resembling healthy monocytes but showing more blebs.
Area of Science:
- Hematology
- Cell Biology
- Oncology
Background:
- Leukemia encompasses a group of cancers affecting blood and bone marrow.
- Acute myeloid leukemia (AML) subtypes M4 and M5 are characterized by monocytic differentiation.
- Understanding the ultrastructural morphology of leukemic cells is crucial for diagnosis and classification.
Purpose of the Study:
- To investigate the ultrastructural characteristics of monocytic blast cells in M4 and M5 leukemia.
- To compare the morphology of these leukemic cells with healthy monocytes.
Main Methods:
- Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were employed.
- Ultrastructural analysis was performed on monocytic blast cells from 37 patients diagnosed with M4 or M5 leukemia.
Main Results:
- Significant variation in nuclear size and shape was observed, correlating with the stage of cell differentiation.
- Nuclear pockets, appendices, and bridges were identified.
- Cytoplasmic features included perinuclear fibrils, elongated mitochondria, and Auer bodies.
- Cell surface ultrastructure was generally similar to healthy monocytes, but frequently exhibited numerous blebs.
Conclusions:
- The study elucidates specific ultrastructural markers in M4 and M5 leukemia monocytic blast cells.
- These findings contribute to the detailed morphological characterization of these leukemia subtypes.
- Electron microscopy provides valuable insights into the differentiation and aberrant features of leukemic monocytes.