A case with local recurrence of rectal cancer that responded to S-1 and PSK with long-term complete response

Ken Ichi Takahashi, Tetsuya Kakita, Yuji Funayama, Hiromi Tokumura, Takashi Toshima, Shoji Fukuyama, Hiroaki Musya, Naoki Matsumura, Hiroyuki Sasaki, Akihiro Yasumoto