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Cutaneous malignant lymphoma in an infant
Y Umebayashi1, H Nameki, Y Saito
1Department of Dermatology, Hitachi General Hospital, Ibaraki, Japan.
Insights
This study details a rare infant cutaneous malignant lymphoma case, exclusively affecting the skin. Findings suggest a B-cell origin, contributing to understanding pediatric lymphomas.
Area of Science:
- Pediatric Oncology
- Dermatopathology
- Immunophenotyping
Background:
- Cutaneous malignant lymphoma (CML) is rare in infants.
- Early diagnosis and characterization are crucial for treatment.
- Understanding the cellular origin aids in therapeutic strategies.
Observation:
- A 7-month-old infant presented with CML as the sole apparent organ involvement.
- Skin biopsy revealed neoplastic lymphoid infiltrate.
- No other organ systems were clinically or pathologically affected.
Findings:
- Immunophenotypic analysis showed the infiltrate was positive for B4 (CD19), J5 (CD10), and cytoplasmic mu chain, and lambda chain.
- The neoplastic cells were negative for B1 (CD20).
- These markers indicate a B-cell lineage.
Implications:
- The case highlights a distinct B-cell CML presentation in infancy.
- This finding contributes to the limited literature on infant lymphomas.
- Further research into infant-specific lymphoma subtypes is warranted.
Abstract:
A case of cutaneous malignant lymphoma in a 7-month-old infant is described. The skin was the only apparent organ involved. Immunophenotypic studies revealed that the infiltrate was positive for B4 (CD19), J5 (CD10), and cytoplasmic mu chain, and lambda chain, but negative for B1 (CD20). The significance of these findings is discussed. We believed the tumor was of B-cell origin. The reported cases of cutaneous malignant lymphoma in infancy are briefly reviewed.