Tan stools may be anindication of liver problems. Perhaps have your LFT checked.
Any blockage in the biliary tree can cause tan stools. With the history of cancer, you may want to be evaluated for any liver masses which can lead to blockages. An abdominal ultrasound would be the most reasonable initial test.
If the symptoms continue, you may want to consider a colonoscopy to ensure there has been no recurrance of cancer. Any sustained change in bowel movements would warrant endoscopy.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b
often after surgery,you need to restore the flora in your system.