"Only three days ago, I warned Robin's wife, Dwina, son Robin John and brother Barry that I feared the worst," said Gibb's physician, Dr. Andrew Thillainayagam, in a statement released Sunday. "We felt it was very likely that Robin would succumb to . . . insurmountable obstacles to any form of meaningful recovery."
He added, "It is testament to Robin's extraordinary courage, iron will and deep reserves of physical strength that he has overcome quite incredible odds to get where he is now."
Gibb's spokesman, Doug Wright, told the BBC that the singer, 62, was able to communicate with family, who have maintained a vigil around his bedside in a central London hospital.
Gibb -- who with older brother Barry and late twin Maurice formed the pop trio turned disco hit-makers -- has battled liver and colorectal cancer for several months. Weakened from chemotherapy and two operations, he had fallen into a coma after contracting pneumonia.