PMID- 36703597 OWN - NLM STAT- MEDLINE DCOM- 20230706 LR - 20230706 IS - 1098-1101 (Electronic) IS - 0733-2459 (Linking) VI - 38 IP - 4 DP - 2023 Aug TI - Successful treatment of pure red cell aplasia using therapeutic plasma exchange after ABO-incompatible hematopoietic stem cell transplant. PG - 495-499 LID - 10.1002/jca.22041 [doi] AB - Hematopoietic stem cell transplants (HSCTs) are widely used in the treatment of hematologic malignancies and bone marrow failure syndromes. ABO compatibility is typically of secondary importance, and up to 50% of HSCT are performed in ABO-incompatible pairings. In the literature, pure red cell aplasia (PRCA) occurs in 1% to 50% of all major/bidirectional ABO-incompatible stem cell transplants, but treatment of PRCA remains heterogeneous. Here, we report two cases in which patients with transfusion-dependent PRCA following HSCT were successfully treated with therapeutic plasma exchange (TPE). Case 1: A 52-year-old type O-positive male with acute myeloid leukemia underwent HSCT using apheresis-derived HSCs from a fully human leukocyte antigen (HLA)-matched, related type A-positive male donor. He developed PRCA that was refractory to multiple therapies, so a series of 10 TPE was performed over 3 weeks. Case 2: A 21-year-old type A-positive male with aplastic anemia underwent HSCT using bone marrow-derived HSCs from a fully HLA-matched related type B-positive female donor. He developed PRCA that was refractory to multiple therapies, so a series of 5 TPE was performed over 2 weeks. Case 1: The patient has been transfusion independent since TPE #7, and type A red blood cells (RBCs) were seen on the ABO type after TPE #9. Case 2: The patient has been transfusion independent since after TPE #1, and type B RBCs were seen on the ABO type after TPE #5. TPE was successful in treating two patients with PRCA after ABO-incompatible HSCT transplants. Isoagglutinin titers decreased below the level of detection for both our patients. Ultimately both patients became transfusion independent and showed evidence of erythroid cell recovery. CI - (c) 2023 Wiley Periodicals LLC. FAU - Vivero, Angelica AU - Vivero A AUID- ORCID: 0000-0002-0251-3593 AD - Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA. FAU - Peedin, Alexis R AU - Peedin AR AUID- ORCID: 0000-0003-3779-8602 AD - Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA. FAU - Gao, Yuanzheng AU - Gao Y AD - Department of Pathology, Cooper University Health Care, Camden, New Jersey, USA. FAU - Karp, Julie Katz AU - Karp JK AUID- ORCID: 0000-0002-5970-4585 AD - Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA. LA - eng PT - Case Reports DEP - 20230126 PL - United States TA - J Clin Apher JT - Journal of clinical apheresis JID - 8216305 RN - 0 (ABO Blood-Group System) SB - IM MH - Humans MH - Male MH - Female MH - Middle Aged MH - Infant MH - *Hematopoietic Stem Cell Transplantation MH - Plasma Exchange MH - *Red-Cell Aplasia, Pure/therapy MH - Erythrocytes MH - Transplantation, Homologous MH - Blood Group Incompatibility/therapy MH - ABO Blood-Group System OTO - NOTNLM OT - ABO-incompatible hematopoietic stem cell transplant OT - pure red cell aplasia OT - therapeutic plasma exchange EDAT- 2023/01/28 06:00 MHDA- 2023/07/06 06:42 CRDT- 2023/01/27 02:03 PHST- 2022/12/05 00:00 [revised] PHST- 2021/09/30 00:00 [received] PHST- 2023/01/06 00:00 [accepted] PHST- 2023/07/06 06:42 [medline] PHST- 2023/01/28 06:00 [pubmed] PHST- 2023/01/27 02:03 [entrez] AID - 10.1002/jca.22041 [doi] PST - ppublish SO - J Clin Apher. 2023 Aug;38(4):495-499. doi: 10.1002/jca.22041. Epub 2023 Jan 26.