Surprisingly bitter news because he had been doing so well before!
I really thought he was on the mend.
Yet now, his family requests increased tefillot on his behalf due to the latest test results.
If possible, it's so beneficial to dedicate any good deed you do to his merit.
I firmly believe that just as our tefillot, b'chasdei Hashem, got him so much better before, our tefillot can definitely heal him now, b'ezrat Hashem.
May the Almighty please grant Binyamin Yisroel ben Chanita a complete refuah of the nefesh & body, along with all the other cholei Yisrael.