CKF is the last stage of CKD.

Chronic kidney disease (CKD), also known as chronic renal disease, is a progressive loss of renal function over a period of months or years through five stages. Each stage is a progression through an abnormally low and progressively worse glomerular filtration rate, which is usually determined indirectly by the creatinine level in blood serum.[1]

Stage 1 CKD is mildly diminished renal function, with few overt symptoms.

Stage 5 CKD is a severe illness and requires some form of renal replacement therapy (dialysis or renal transplant). Stage 5 CKD is also called end-stage renal disease (ESRD). ESRD is how the US Centers for Medicare and Medicaid Services and US federal legislation reference this stage of illness. Stage 5 CKD is also known as chronic kidney failure (CKF) or chronic renal failure (CRF).

http://en.wikipedia.org/wiki/Chronic_renal_failure

--------------------------------------------------
Note added at 2 hrs (2007-11-27 05:43:39 GMT)
--------------------------------------------------

If you need Arabic translation, you may change the language pair from English>English to English>Arabic

Anyway, it is القصور الكلوي المزمن/المرض الكلوي المزمن

http://www.akhbar.tn/akhbar/2007/03/06-008.html
http://www.akhbarnouakchott.com/mapeci/Ar/440/tahkik.htm
http://www.alkahf.com/nadi/showthread.php?p=146197

http://embacubairan.com/Informe Bloqueo/Informe-BLOQUEO 15 A...
http://www.medicationabortion.com/Arabic/questions/notuse.ht...
http://www.3bir.com/web/showthread-t_29693.html