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Abstract
Hemorrhagic cystitis (HC) is one of the most troublesome complications of bone marrow transplantation (BMT) and sometimes may be life-threatening. The etiology and prevalence of HC depends on the type of the transplant and the period after BMT. Here we report about 134 patients transplanted in a single center (89 allogeneic and 45 autologous) between May 1988 and August 1995. Forty-six patients (34.3%) had HC after BMT. Thirty-four (38%) alloBMT patients and 12 (27%) autoBMT patients had HC (p=0.18). The onset of HC was 7 to 125 days after transplantation. The degree of HC was mild to moderate in 25 (28%) and severe in 9 (10%) allogeneic transplants. In autologous transplants, all of the episodes of HC were mild to moderate. Age, sex, diagnosis and the dosage of mesna used for prophylaxis were not correlated with the incidence of HC. In 36 of 46 (78.2%) patients HC occurred early and as a transient form. Ten (21.7%) were late and long-lasting. In 2 patients who had late starting and long-lasting HC after allogeneic BMT, electron microscopic examinations revealed virus-like structures in bladder epithelial cells.