Cryopreserved versus non-cryopreserved stem cell autografts in multiple myeloma a restrospective cohort study.

The use of non-cryopreserved hematopoietic stem cells (HSC) can be an alternative to the traditional cryopreserved infusions of HSCs in autologous stem cell transplantation (aHSCT). After high-dose melphalan conditioning (HDM), we sought to compare time to engraftment, overall survival, and safety in multiple myeloma (MM) patients undergoing a first aHSCT after high-dose melphalan conditioning (HDM). We conducted a cohort study from March 2018 to December 2019. Of all autologous transplants performed during this period, 105 were for MM as the first consolidation. Fifty-one patients received a cryopreserved graft; the remaining 54 patients received a fresh infusion. General clinical characteristics were similar between these two groups. Cell viability was higher in non-cryopreserved grafts (95% vs. 86% p < 0.01). Four deaths occurred during hospitalization in the cryopreserved group, one in the non-cryopreserved group. The cumulative incidence of neutrophil and platelet engraftment on D + 25 was higher in the non-cryopreserved compared to the cryopreserved group (98% vs 90% p < 0.01 and 96.2% vs 72.54% p < 0.01 respectively). Additionally, the hospital length of stay was reduced by 4 days for patients for the non-cryopreserved cohort. In summary, the use of non-cryopreserved HSCs after HDM is safe and effective compared to patients who received a cryopreserved graft.

Immune-mediated pancytopenia induced by oxaliplatin: a case report.

BACKGROUND: Drug-induced immune pancytopenia is considered an uncommon disorder. CASE REPORT: A 76-year-old woman with metastatic gastric adenocarcinoma received 15 cycles of FOLFOX-6 (oxaliplatin/folinic acid/fluorouracil) with a complete response. Upon disease progression, she was restarted on FOLFOX; during the seventh cycle of treatment, 1 hour after completing her oxaliplatin infusion, she presented oral bleeding, petechiae and generalized hematomas. Her platelet (PLT) count decreased from 164 x 10(9)/L to less than 5 x 10(9)/L within a 3-hour period and her white blood cells (WBCs) decreased from 5 x 10(9) to 1.5 x 10(9)/L. One day later she presented a decrease in hemoglobin level (from 11.4 to 10 g/dL, reaching 8.9 g/dL after 5 days). The patient's PLT and lymphocyte count started to recover after 3 days of immunosuppressive treatment. STUDY DESIGN AND METHODS: PLT, red blood cell (RBC), and WBC antibody detection tests were performed in the presence and absence of oxaliplatin. PLT-associated antibodies were evaluated by monoclonal antibody immobilization of PLT antigen assay and flow cytometry; WBC antibodies were tested by flow cytometry; and RBC antibodies were evaluated by gel and indirect antiglobulin test tube testing drug-treated RBCs and untreated RBCs in the presence of drug. RESULTS: Positive reactions were obtained only in the presence of the drug (1 mg/mL) for all tests performed (PLTs, RBCs, and WBCs). CONCLUSIONS: Our case convincingly demonstrates that oxaliplatin led to the production of drug-dependent PLT, RBC, and WBC antibodies inducing pancytopenia in the patient. The oxaliplatin was discontinued and patient's hematologic values recovered to normal levels.