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[Bone marrow necrosis in thymic T cell lymphoma].
1Third Department of Internal Medicine, Hokkaido University School of Medicine.
Summary
This case study details a rare thymic T cell lymphoma in a young male, identified by specific cell markers and gene rearrangements. The aggressive cancer showed rapid progression, leading to patient death despite chemotherapy.
Area of Science:
- Oncology
- Hematology
- Immunology
Background:
- A 29-year-old male presented with exertional dyspnea and pleural effusion.
- Physical examination revealed enlarged left supraclavicular and mediastinal lymph nodes.
Observation:
- Cytological analysis of pleural fluid showed atypical lymphoid cells and eosinophils.
- Tumor cells expressed CD5 and CD38 surface markers, indicative of early thymocyte lineage.
- Southern blotting confirmed T-cell receptor beta (TCR-beta) gene rearrangement.
Findings:
- The patient was diagnosed with thymic T cell lymphoma.
- Bone marrow biopsy revealed extensive tumor infiltration with reticulin fibrosis and necrosis.
- The lymphoma was refractory to aggressive combination chemotherapy.
Implications:
- This case highlights the diagnostic challenges and aggressive nature of thymic T cell lymphoma.
- Early thymocyte markers (CD5, CD38) and TCR gene rearrangement are crucial for diagnosis.
- The poor response to chemotherapy underscores the need for novel therapeutic strategies for this rare malignancy.