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Objective: Despite increasing use of hematopoietic stem cell transplantation (HSCT) for adults with sickle cell disease (SCD), little is known about pain management experiences throughout this process. The objective of this study was to explore patients' experiences with pain and pain management during and after HSCT for SCD., Methods: We conducted a qualitative interview study with 10 patients who underwent HSCT for SCD. We transcribed interviews verbatim and inductively identified codes. We used thematic analysis alongside a constant comparative method to develop and refine a codebook that aided in the identification of themes., Results: Four key themes emerged. (1) The pain trajectory: patients described a fluctuating course of pain during HSCT, which often extended long afterwards and impacted all aspects of life, particularly affected by pre-HSCT experiences; (2) The role of opioids-a double-edged sword: patients described opioids as reducing pain but insufficiently to balance significant adverse effects and burden; (3) Patient-centered decision making in pain management: patients described insufficient agency in decisions about opioid use and weaning; and (4) Consequences of health-related stigma: patients described experiences with stigma, mainly related to opioid use and weaning, as similar to pre-HSCT., Conclusions: From the perspective of patients who have undergone HSCT for SCD, clinicians should use a patient-centered approach, integrating non-opioid approaches into pain management, particularly psychosocial support. As transplant for SCD becomes increasingly available, incorporating patient perspectives may improve health care delivery and overall patient experiences., (© The Author(s) 2021. Published by Oxford University Press on behalf of the American Academy of Pain Medicine. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)

Allogeneic marrow transplantation can cure sickle cell disease; however, HLA-matched donors are difficult to find, and the toxicities of myeloablative conditioning are prohibitive for most adults with this disease. We developed a nonmyeloablative bone marrow transplantation platform using related, including HLA-haploidentical, donors for patients with sickle cell disease. The regimen consisted of antithymocyte globulin, fludarabine, cyclophosphamide, and total body irradiation, and graft-versus-host disease prophylaxis with posttransplantation high-dose cyclophosphamide, mycophenolate mofetil, and tacrolimus or sirolimus. After screening 19 patients, we transplanted 17, 14 from HLA-haploidentical and 3 from HLA-matched related donors. Eleven patients engrafted durably. With a median follow-up of 711 days (minimal follow up 224 days), 10 patients are asymptomatic, and 6 patients are off immunosupression. Only 1 patient developed skin-only acute graft-versus-host disease that resolved without any therapy; no mortality was seen. Nonmyeloablative conditioning with posttransplantation high-dose cyclophosphamide expands the donor pool, making marrow transplantation feasible for most patients with sickle cell disease, and is associated with a low risk of complications, even with haploidentical related donors. Graft failure, 43% in haploidentical pairs, remains a major obstacle but may be acceptable in a fraction of patients if the majority can be cured without serious toxicities.