Objectives: To study the change of blood cell counts in gastric and colon cancer patients before and after the surgery. Method: Analysis of full blood cell count from 104 patients (38 with gastric cancer and 66 with colon cancer) before and after operation. Results: Anemia has seen in 44.7 percent patients with colon cancer and 33.6 percent patients with gastric cancer. Hemoglobin and platelet were decreased
white blood cell was increased right after operation, however, all the indices have recovered after 7 days. Conclusion: Anemia was in quite high frequent in digestive cancers. The change of blood cell indices was related with operation
however, the recovery was completed early.