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A Case Report: Large Granular Cell Leukemia/Lymphoma (LGL)
Insights
This case study highlights an aggressive T-large granular lymphocytic leukemia/lymphoma. Diagnosis requires specific immunophenotyping and genotyping to identify this distinct hematologic malignancy.
Area of Science:
- Hematology
- Oncology
- Immunology
Background:
- Large granular lymphocytic leukemia/lymphoma (T-LGL) is a rare hematologic malignancy.
- It is characterized by an aggressive clinical course in some patients.
- T-LGL presents with specific clinicobiological features.
Purpose of the Study:
- To present a case of T-large granular lymphocytic leukemia/lymphoma (T-LGL).
- To illustrate the diagnostic approach for T-LGL.
- To emphasize the importance of immunophenotyping and genotyping in diagnosing T-LGL.
Main Methods:
- Peripheral blood smear analysis to identify large granular lymphocytes.
- Immunophenotyping using flow cytometry to determine T-cell lineage (CD2, CD3, CD5 positive).
- DNA hybridization technique to demonstrate T-cell receptor (TCR) gene rearrangement.
Main Results:
- A 64-year-old male patient presented with an aggressive clinical course of T-LGL.
- Peripheral blood smear revealed large granular lymphocytes.
- Immunophenotyping confirmed a T-cell lineage.
- Genotyping demonstrated clonal rearrangement of the TCR gene.
Conclusions:
- T-large granular lymphocytic leukemia/lymphoma is a distinct entity.
- Diagnosis requires a combination of clinical, immunophenotypic, and genotypic analyses.
- Early and accurate diagnosis is crucial for managing aggressive cases of T-LGL.
Abstract:
We presented a 64-year-old male patient with T-large granular cell leukemia/lymphoma with an agressive clinical course. Large granular lymphocytes were noted on peripheral blood smear. The phenotyping of the cells was typical T-cell lineage [CD2 (+), CD3 (+), CD5 (+)]. Clonal rearrangement of the T-cell receptor gene (TCR) was demonstrated by DNA hybridization technique. Large granular cell leukemia/lymphoma is a distinct entity with spesific clinicobiological aspects. The clinical spectrum is wide and immunophenotyping and genotyping studies need to make a diagnosis.
