We retrospectively evaluated the rate of renal dysfunction during treatment with liposomal amphotericin B (L-AmB) (3–4 mg/kg, for 7–10 days) in nine consecutive patients with visceral leishmaniasis (VL). During the first week of treatment, 5 patients (56%) experienced transient deterioration of renal function, with a rise in serum creatinine to 1.27–2.44 times the baseline level, and a parallel elevation of uric acid levels without other metabolic or electrolyte disturbances. Serum renal function parameters were restored to normal levels after the completion of therapy, on day 21. These 5 patients had presented with prolonged fever and/or significant spleen enlargement, reflecting high parasite load. This observation suggests that treatment of VL with intermittent L-AmB causes a subclinical tumor lysis-like syndrome, especially in patients with high parasite load.
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