We just can't play "by the book," it seems. Mom is doing really well in all aspects of her recovery, except that she's leaking a mystery fluid (which is now assumed to be chyle) at an alarming rate. The weirdness that put her back in the hospital over the weekend is now thought to have merely been a rather severe reaction to a cephalosporin. There was no infection (a huge praise), and everything looks great.
She's gotten three of her drains out, and is spinning her wheels at home, but the two remaining drains are collecting an abundance of this chyle at present, so they stay in. There is most likely a fissure somewhere that is allowing this fluid to leak out, and unless it heals spontaneously, we're looking at more surgery to locate and repair it. Obviously, no one wants that, but we can't get her to stop leaking!
Thanks again to everyone for all the continued support, prayers, and positive thinking on my mom's behalf. If she could just get rid of those stupid drains now, she'd be back in full swing in no time. What's worrisome is that she can't proceed with the treatment of the cancer (if such treatment shall be required) until this issue with the leaking chyle is resolved.
It's all very frustrating.