Type 1 Diabetes Driven by Residual Recipient T Cells After Hematopoietic Cell Transplantation: A Case Report.

Diabetes CareSep 1, 2026
Case ReportHematologyEndocrinologyOpen access

Martin A Thelin, Soohee Cho, Aïsha Callebaut et al.

✦ AI-curated · Sources linked

Case in brief

A patient developed type 1 diabetes following haploidentical hematopoietic cell transplantation. Analysis revealed an expanded population of islet-specific CD4+ T cells in the recipient, predominantly restricted by recipient-specific HLA alleles, indicating that the diabetes was driven by residual host T cells rather than donor autoimmunity. The condition persisted despite extensive immunotherapy.

Diagnostic / clinical pearl

Clinicians should consider the possibility of residual recipient T cells as a cause of posttransplant type 1 diabetes, particularly in cases with significant donor chimerism.

Why it matters

This case highlights the potential for established islet autoimmunity to persist despite myeloablative conditioning and immunotherapy, emphasizing the complexity of posttransplant diabetes management.

Source

Published in Diabetes Care. This summary was written by xxcode from the publication's abstract and metadata. It is not peer reviewed and is not a substitute for the original article. For clinical decisions, review the original publication.

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AI-generated summaries may contain errors or omissions. Verify clinically important information with the original publication.

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