How can you distinguish between the symptoms of right and left colon cancer?

Subtle bleed vs.obst: Depending on what side of the colon a lesion arises, symptoms are different. The fecaloid material within the rt. colon is essentially liquid and when passing over the tumor causes little symptoms. On the left side the stool is devoid of water and very firm. Passing over the tumor causes possible bleeding and when tumor large the feces cant pass and obstruction develops.