Department of Plastic and Reconstructive Surgery;
Graduate School of Medicine;
Hokkaido University;
Sapporo;
Japan;
Division of Head and Neck Surgery;
Hokkaido Cancer Center;
Sapporo;
Japan;
Division of Plastic and Reconstructive Surgery;
Hokkaido Cancer Center;
Sapporo;
Japan;
Pectoralis; Major; Myocutaneous; Flap; Head; and; Neck; Reconstruction; Pedicled; Flap; Pedicled; Pectoralis; Major; Myocutaneous; Flap; Reconstruction; Microsurgery;