Synchronous B-lymphoblastic leukemia/lymphoma and subcutaneous panniculitis-like T-cell lymphoma in an 11-year-old pediatric patient

Subcutaneous panniculitis-like T-cell lymphoma (SPTCL) is rare in pediatric patients, whereas B-lymphoblastic leukemia/lymphoma (B-ALL) is a common childhood hematologic malignancy. The synchronous occurrence of these two distinct lymphoid neoplasms is exceedingly rare, with only two previously reported pediatric cases. We describe the case of an 11-year-old boy with biopsy-proven SPTCL whose staging marrow examination revealed concurrent B-ALL. The patient was treated according to the B-ALL protocol, and the cutaneous lesions resolved promptly after induction therapy. This case highlights the importance of comprehensive skin biopsy and staging. Management in such cases should be directed toward the B-ALL component.