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9121 Background: The IRMA study reported the high prevalence of renal insufficiency (RI) in 4684 solid tumour patients, with a glomerular filtration rate (GFR) 110 μmol/L was assessed. GFR was estimated with Cockcroft-Gault (CG) and abbreviated MDRD (aMDRD) formulae. Drugs necessitating dosage adjustment and those potentially nephrotoxic were identified. Chi-square test was used to compare the prevalence of RI between patients with BM and patients without, for all patients and for breast cancer (BC) ones. Results: 1,000 patients (BC 577) with BM were included: median age 60, mean 59.8, weight 66 kg, 659 women. The prevalence of SCR>110 μmol/L was 8.3%. That of GFR [Table: see text] No significant financial relationships to disclose.

9559 Background: The IRMA-1 study reported the high prevalence of renal insufficiency (RI) in 4,684 cancer patients, with a glomerular filtration rate (GFR) 2 for 52.9% and 12.0%, respectively. Furthermore, almost 80% of patients were receiving nephrotoxic drugs or drugs necessitating dosage adjustment. The IRMA-2 study was started one year later, in different patients, and consisted of 2 phases: 1) a cross-sectional study, similar to IRMA-1, and 2) a 2-year retrospective follow-up of the patients to describe the evolution of their renal function along with time. Data from the phase 1 were compared to the results of IRMA-1 in terms of RI prevalence. Methods: Data were collected for cancer patients presenting at one of the 19 IRMA-2 centers in March 2005: type of tumour, sex, age, weight, serum creatinine (SCR), and anticancer drugs. Dialysis, myeloma and lymphoma patients were not included. The prevalence of SCR>110 μmol/L was assessed. GFR was estimated with the aMDRD formula, anticancer drugs necessitating dosage adjustment and those potentially nephrotoxic were identified. Results: 4,945 patients (breast 1816, colorectal 747, lung 463, ovarian 294, prostate 251) were included in the IRMA-2 study. Median age 60.0, mean weight 66.2, 62.8% were women. The prevalence of an elevated SCR (SCR>110μmol/l) was 7.2% (vs. 7.2% in IRMA-1), that of a GFR < 90 ml/min/1.73m2 was 50.2% (vs. 52.9%) and that of a GFR < 60 ml/min/1.73m2 was 11.9% (vs. 12.0%) ( Table ). 73.2% of treated patients (n=3882) were receiving at least one drug needing dosage adjustment and 75.5% received at least one nephrotoxic drug (vs. 79.9 and 80.1%, respectively). Conclusions: The results of IRMA-2 and IRMA-1 confirm the high prevalence of RI in cancer patients, on 2 different cohorts of nearly 5,000 cancer patients each. This underlines that estimating renal function in cancer patients is mandatory and that this highly frequent co-morbidity should be considered. [Table: see text] No significant financial relationships to disclose.

e20574 Background: In 2007, the IRMA-1 study reported the high prevalence of renal insufficiency (RI) in cancer patients. Because of this high frequency, the IRMA-2 study started to investigate the evolution of renal function in cancer patients. Methods: Data were collected for cancer patients presenting at one of the 19 IRMA-2 centers in March 2005. Data included: sex, age, weight, serum creatinine (SCR), haemoglobinemia, type of tumour, metastasis (bone and/or visceral) anticancer drugs. Dialysis, myeloma and lymphoma patients were not included. Glomerular filtration rate was estimated with the abbreviated RD (aRD) formula at the inclusion. Patients were retrospectively followed during 2 years after the inclusion, every 6 months, from March 2005 (T0) to March 2007 (T24). Results: 4945 cancer patients (breast 1816, colorectal 747, lung 463, ovarian 294, prostate 251) were included in 19 cancer centre in France. Median age 60.0, mean weight 66.2, 62.8% were women. Mean GFR decreased from 90.8 ml/min/1.73m2 to 83.7 over the two years (table). Meanwhile, the prevalence of RI increased, reaching 62.9% and 17.5% for a GFR=90 at T0 had a GFR2 per year. This suggests that cancer patients are more exposed to a deterioration of renal function and that it should be closely monitored with at least a regular estimation of renal function, for instance every 6 months. So far, such a follow-up is not performed in clinical practice. Furthermore, drug therapy should be reevaluated, dosages adjusted when necessary, and some potentially nephrotoxic drugs changed for less or non-nephrotoxic drugs if possible. No significant financial relationships to disclose.

8603 Background: Patients with abnormal renal function are at high-risk for drug-induced nephrotoxicity. Furthermore, near half anticancer drugs are predominantly excreted in urine and dosage adjustment in RI is therefore a crucial issue. In 2005, the IRMA study (Insuffisance Rénale et Médicaments Anticancéreux) thus investigated the prevalence of RI in cancer patients and the profile of anticancer drugs prescribed. Methods: Data were collected for cancer patients presenting at one of the 14 IRMA centers in February 1st-15th or October 1st-15th, 2004: type of tumour, sex, age, weight, serum creatinine (SCR), haemoglobinemia, anticancer drugs. Dialysis and myeloma patients were not included. The prevalence of SCR>110 μmol/L was assessed. GFR was estimated with the Cockcroft-Gault (CG) and the abbreviated MDRD (aMDRD) formulae and patients were classified according to their K/DOQI stage of RI (Table). Anticancer drugs necessitating dosage adjustment and those potentially nephrotoxic were identified. Results: 4,684 patients (Breast, 1,898; Colorectal, 573; Lung, 445; Ovarian, 270; Prostate, 222) were included: mean age 58.1 years, weight 65.8 kg, sex-ratio 0.55. The prevalence of elevated SCR was 7.2% and those of GFR [Table: see text] No significant financial relationships to disclose.

20649 Background: Both anticancer drugs and kidney disease (KD) may induce anemia. In this analysis, we studied hemoglobin (Hb) levels of the pts in parallel with their renal function (RF) and thei...