Analysis of the incidence of tumor lysis syndrome in patients with hematological malignancies treated with rasburicase

A Retrospective Single-Center Study of Sevelamer Hydrochloride for the Treatment of Hyperphosphatemia in Children With Tumor Lysis Syndrome

Introduction Tumor lysis syndrome (TLS) is a life-threatening metabolic abnormality. The incidence of TLS depends on the underlying malignancy. In a recent analysis of hematological malignancy, the incidence of clinical TLS in children was 3.8%, laboratory TLS 46.2%, and hyperphosphatemia 32.7%. Sevelamer is effective for the treatment of hyperphosphatemia associated with renal failure; however, there is no clear data that it has the same effect in treating hyperphosphatemia with TLS. Methods This was a retrospective study among children aged ≤14 years with hematological malignancy who developed TLS and received sevelamer to treat hyperphosphatemia at Princess Norah Oncology Center, King Abdulaziz Medical City (KAMC) in Jeddah from January 2012 to December 2016. Results A total of 34 patients received sevelamer. The majority was male (64%), with a median age of six years. The median sevelamer dose per day was 1600 mg, while the median duration of use was two days. Phosphate level was significantly decreased at different times (24 hours, 48 hours, and 72 hours) during sevelamer usage, p-value <0.001. Conclusion In our study, the use of sevelamer resulted in a significant decrease in phosphate levels. This finding further consolidates the efficacy of sevelamer in treating hyperphosphatemia with TLS. However, further research into the drug's kinetics is recommended.

Impact of early rasburicase on incidence of clinical tumor lysis syndrome in lymphoma

Early administration of rasburicase to enhance uric acid (UA) elimination has been adopted without robust evidence in support of its impact on clinical outcomes in tumor lysis syndrome (TLS), specifically, the prevention of acute kidney injury (AKI). This was a retrospective cohort study of adult lymphoma patients at intermediate or high risk for TLS. Excluded patients had AKI or were on dialysis at hospital admission. The incidence of new AKI in the setting of TLS was described along with predictors of its development, including early rasburicase use. In 383 included patients, the incidence of new-onset AKI during hospitalization was 6%. Predictors included age, history of renal or cardiovascular disease, and UA >8 mg/dL. Rasburicase use did not significantly impact the risk of developing AKI (HR 2.3; p = .11). The UA level at the time of administration did not modify the effect of rasburicase on prevention of AKI (p = .36 for the interaction term).

A cost comparison of rasburicase versus dialysis in the management of children with acute leukaemia and lymphoma at a South African centre

Background: Tumour lysis syndrome is a common complication of haematological malignancies and has historically been managed with hyperhydration, urine alkalinisation and allopurinol with renal dialysis reserved for patients in acute renal failure. Rasburicase has been shown to drastically reduce the need for dialysis; however, its use is limited in developing countries owing to its cost and availability.Aim: This retrospective analysis aimed to compare the cost to state per patient of rasburicase compared to dialysis in the management and prevention of tumour lysis syndrome in paediatric patients presenting with haematological malignancies admitted to Red Cross War Memorial Children’s Hospital (RCWMCH).Setting: Red Cross War Memorial Children’s Hospital.Methods: Patients from two consecutive 35 month periods, before and after the availability of rasburicase at RCWMCH, were grouped according to treatment modality, and the cumulative costs of hospitalisation, dialysis and drug administration were compared.Results: The groups were comparable in mean age and gender. The mean total length of hospital stay was 10.04 days shorter for the rasburicase group than the dialysis group with the average cost per patient in the rasburicase group being R40 989.64 lower than the dialysis group.Conclusion: The use of rasburicase results in a significant per patient cost saving when compared to dialysis, which often requires intensive care admission, and results in extended hospitalisation. The study supports the continued use of rasburicase as an essential adjunct in the management and prevention of tumour lysis syndrome, reaffirming its use as a cost-effective and efficient drug.