Isolated Extramedullary Relapse After Human Leukocyte Antigen-Matched Myeloablative Allogeneic Hematopoietic Stem Cell Transplantation in Acute Myeloid Leukemia Patients: Case Reports and Literature Review.

Transplantation Proceedings
Photsawee KhemaphiphatChantiya Chanswangphuwana

Abstract

Isolated extramedullary relapse (iEMR) of acute myeloid leukemia (AML) after allogeneic hematopoietic stem cell transplantation (allo-HSCT) is rare and has a dismal prognosis. Among 67 patients with AML after allo-HSCT, iEMR and bone marrow relapse occurred in 6% and 20.9%, respectively, with a median time to relapse of 11.5 and 6.5 months, respectively. Here, we presented 4 iEMR-AML cases. Common relapse locations occurred in the central nervous system, skin, and lymph nodes. We also report a rare case of cardiac iEMR that responded to chemoradiotherapy. Two cases responded to local/systemic treatments, which resulted in prolonged survival. Another case had iEMR in the presence of chronic graft-versus-host disease. Bone marrow relapse occurring after iEMR was typical and found in three-fourths of the cases. In conclusion, iEMR-AML occurrence after allo-HSCT is not rare in Thai patients. Its unpredictability and lack of graft-versus-leukemia effect highlight the importance of monitoring EMR carefully and promptly providing treatments once it is detected.

References

Oct 27, 2006·Leukemia & Lymphoma·Isabel Cunningham
Jun 28, 2011·Biology of Blood and Marrow Transplantation : Journal of the American Society for Blood and Marrow Transplantation·Melhem SolhDan S Kaufman
Sep 24, 2011·Journal of Pediatric Hematology/oncology·Thomas CashAmir Mian
May 29, 2012·Biology of Blood and Marrow Transplantation : Journal of the American Society for Blood and Marrow Transplantation·Satoshi YoshiharaHiroyasu Ogawa
Apr 8, 2014·Biology of Blood and Marrow Transplantation : Journal of the American Society for Blood and Marrow Transplantation·Ling GeXiaowen Tang
Apr 12, 2017·Biology of Blood and Marrow Transplantation : Journal of the American Society for Blood and Marrow Transplantation·Noga Shem-TovAvichai Shimoni
May 28, 2019·Biology of Blood and Marrow Transplantation : Journal of the American Society for Blood and Marrow Transplantation·Ioanna SakellariAchilles Anagnostopoulos

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