Tumors can be benign or malignant.
Symptoms can be chronic and or intermittent and include abdominal pain, nausea, weight loss and bleeding. The larger the tumor, the more likely the patient will experience symptoms of bowel obstruction. Tumors can also become ulcerated and bleed. Hamartomas Lymphangiomas Leiomyoma Leiomyomas are tumors of one of the muscle layers of the bowel wall. They can be very difficult to diagnose, especially when they occur in the small intestine.