Welcome to the forum. There will be lots of members to help you with this exact question. I'm one who doesn't have any kidney involvement, however, I do have the clotting disorder.
She shouldn't have any problem getting a biopsy done. It's a simple matter of stopping her coumadin (warfarin - is that what she's taking?), and doing Heparin injections for 4 days. (done at home. Really easy, and not painful!). Then no injection or coumadin on the day of the procedure. The biopsy is completed, and her normal coumadin doses are restarted that night. A hopital stay of about 4 days is required to make sure she's theraputic with her coumadin. Then she can go home.
That has been my experience with surgery and my blood thinners. I just had major abdominal surgery a month ago. That is what I had to do and it went off without a hitch!
It's very common and very routine. If you're having trouble finding a doctor to do this, I'm shocked.
I also take prednisone, but have never had Cytoxan. There are members here who will be able to help you with more of your questions. If you have any questions about the blood clotting/blood thinners please let me know.
I can do anything through Jesus Christ who strengthens me. I have learned in whatever state I am in,to be content. Phillipians 4:11-13
34 years old. Diagnosed with Lupus in 2000. Fibromyalgia, Anti-phospholipid syndrome(APS)(stroke, 2002), Sjogren's, Raynaud's, Libman Sach's Endocarditis, vasculitis, sacroiliitis, arthritis (neck), anxiety. Prednisone, Imuran, Coumadin, Clobazam, Amitriptyline, Didrocal, Cozaar, Zoloft, Neurontin, calcium, multi-vitamin, vitamin D, Magnesium, vitamin B6, Acidophilus