My wife had a full nephrectomy in mid-July after a scan revealed a growth. At a consultation following the operation she was informed that it was a dedifferentiated liposarcoma and told not to have caffeine. We forgot to ask if this was just during the post-op recovery period or was to be permanent. She was told that her remaining kidney appears to be functioning normally. Could you give us any help or advice on this please? Is there any reason for her to give up caffeine permanently?