A 47-year-old anemic Jehovah's Witness with Gardner's syndrome presented with a large abdominal wall desmoid tumor requiring extensive resection with a musculocutaneous flap reconstruction. At surgery a technique of acute limited normovolemic hemodilution (ALNH) was used to minimize blood loss and avoid blood transfusions. Complications that follow transfusions of homologous blood are reviewed, and a recommendation is made to use ALNH because of its advantages in those patients in whom significant blood loss is expected.