From: HubMed - breast cancer <rssfwd@rssfwd.com>
Date: Sat, Apr 12, 2008 at 8:54 PM
Subject: [Changes in renal function during bisphosphonate treatment of breast cancer patients.]
To: mesothelioma77@gmail.com
[1]Magy Onkol. 2008; 52(1): 49-55
Horváth Z, Farkas P, Ganofszky E, Hitre E, Juhos E, Nagy T, Rubovszky G, Szabó E, Láng I
Renal function aberrations during bisphosphonate treatment is a well-known fenomenon. In our retrospective study we examined renal functions of 97 breast cancer patients with bone metastasis during their first year of bisphosphonate treatment i.e. (1) frequency of initial renal function alterations; (2) frequency of decreasing renal function during bisphosphonate treatment; (3) the connection between the laboratory findings and the renal function parameters measured at the beginning of bisphosphonate treatment. At the beginning of bisphosphonate treatment we found a surprisingly high rate (26.80%) of decreased creatinine clearence calculated by the Cockcroft-Gault formule. Decreased creatinine clearence at least once during bisphosphonate treatment has been found in 32.99% of the patients, and in 13.4% of the patients with decreased renal function parameters before bisphosphonates it remained decreased during the one-year period. Expected normal renal function is prognosticated by the renal function parameters and serum calcium level measured before starting bisphosphonate treatment. However, we could not demonstrate any connection between decreasing renal function and either the route of administration or the generation or type of bisphosphonates or the previous use of platina compounds. Our analysis confirms the necessity of monitoring renal function before and during bisphosphonate treatment, and it is advisable to calculate the creatinine clearence in the upper quater of the normal range of creatinine levels. In case of decreased renal function, change to a less nephrotoxic bisphosphonate or disruption of the treatment is suggested. Whilst our results are out of key with the published literature, the above-mentioned questions should be examined in a prospective trial.
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Source: http://www.hubmed.org/display.cgi?uids=18403297
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