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Follicular large cell lymphoma of the testis in a child
C L Moertel1, J Watterson, S R McCormick
1Department of Hematology/Oncology, Children's Hospital, St. Paul, Minnesota 55102.
Insights
This study reports a rare pediatric primary testicular lymphoma with follicular histology. The lymphoma showed immunoglobulin gene rearrangement but lacked bcl-2 expression, which is unusual for this type of cancer.
Area of Science:
- Pediatric Oncology
- Hematopathology
- Molecular Diagnostics
Background:
- Primary testicular lymphoma is rare in children.
- This case presents a unique instance of follicular lymphoma in a pediatric patient.
Observation:
- The tumor exhibited a lymphocytic infiltrate with a follicular pattern.
- Immunohistochemistry confirmed lambda light chain restriction.
- Gene rearrangement studies indicated a clonal immunoglobulin heavy chain rearrangement.
Findings:
- No bcl-2 protein expression or gene rearrangement was detected.
- Epstein-Barr virus (EBV) was not found in the tumor tissue.
- This represents the first reported case of pediatric primary testicular lymphoma with follicular histology lacking bcl-2 expression.
Implications:
- This case expands the understanding of pediatric testicular lymphoma heterogeneity.
- The absence of bcl-2 expression despite follicular histology warrants further investigation.
- Highlights the importance of molecular analysis in diagnosing and classifying pediatric lymphomas.
Background:
A unique case of primary testicular lymphoma in a child is reported.
Methods:
Tumor tissue was studied using immunohistochemical techniques and southern blot hybridization to detect immunoglobulin and bcl-2 gene rearrangement and in situ hybridization for the Epstein-Barr virus (EBV) genome.
Results:
Light microscopy revealed a lymphocytic infiltrate with a follicular pattern. Immunohistochemical staining revealed lambda light chain restriction and gene rearrangement studies revealed a clonal rearrangement of the immunoglobulin heavy chain, confirming a clonal neoplastic process. Immunostaining failed to detect bcl-2 protein expression, and no evidence of bcl-2 gene rearrangement was noted on southern blot analysis. In situ hybridization for EBV nucleic acid in tumor tissue was negative.
Conclusions:
To the authors' knowledge, this is the first report of a case of a primary testicular lymphoma with follicular histology in a child. Despite the follicular histology, no evidence of bcl-2 expression or gene rearrangement was detected.
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