The symptoms of colonic neoplasm can vary depending on the size and location of the tumor, as well as the severity of the condition. Here are some common symptoms to look out for:Rectal bleeding: Bleeding from the rectum can occur during early stages of colonic neoplasm. It may appear as bright red blood on toilet paper or in the toilet bowl.Stools with blood: Blood in the stool can indicate bleeding from the colon. The blood may appear bright red or dark brown.Changes in bowel habits: Constipation, diarrhea, or a change in the consistency of the stool can occur due to colonic neoplasm.Abdominal pain, cramps, or discomfort: Mild to severe pain or discomfort in the abdomen can be a symptom of colonic neoplasm. The pain may be constant or intermittent.Nausea and vomiting: Nausea and vomiting can occur due to colonic neoplasm, especially if the tumor is obstructing the colon.Loss of appetite: Loss of appetite or feeling full quickly can be a sign of colonic neoplasm.Weight loss: Unexplained weight loss can be a symptom of colonic neoplasm.Fatigue: Fatigue and weakness can occur due to colonic neoplasm, especially if the tumor is affecting the functioning of the colon.