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Results confirm a favourable effect on relapses as pregnancy proceeds, and an early postpartum peak. Pre-conception DMT exposure and low ARR were independently protective against postpartum relapse. This novel finding could provide clinicians with a strategy to minimise postpartum relapse risk in women with MS planning pregnancy.

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Hemorrhagic cystitis is a major complication of high-dose cyclophosphamide therapy used in preparation for allogeneic or autologous bone marrow transplantation. Although previous reports had suggested that the sulfhydryl-containing compound mesna might be superior to forced diuresis in preventing hemorrhagic cystitis, there were concerns about the effect of mesna on engraftment in these studies. To address these concerns, 100 patients were randomized to receive mesna or forced saline diuresis while undergoing bone marrow transplant conditioning with regimens that included high-dose cyclophosphamide. To try to minimize the likelihood of graft rejection, patients who were being transplanted with cyclophosphamide as a sole agent were excluded from the study. After randomization and administration of therapy, patients were monitored by microscopic and dip-stick urinalyses; they were also followed for effects of therapy on engraftment. The incidence of consistent or severe hematuria was 33% in the mesna arm and 20% in the hyperhydration arm (P = .31). Severe bleeding occurred in 12.5% of mesna patients and 7.5% of hyperhydration patients (P = .71). No unexpected toxicities were encountered, and engraftment times did not differ. Based on this randomized trial of 100 patients, we conclude that mesna and hyperhydration are equally effective in preventing cyclophosphamide-induced hemorrhagic cystitis in bone marrow transplantation patients.

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