Duodenal adenomas may be benign or malignant. A duodenal adenoma is a tumor that grows in the duodenum of the body. The tumor is usually benign when it first starts. In the early stages, benign duodenal adenomas usually affect the function of the duodenum, resulting in symptoms of intussusception or pyloric obstruction, which reduces digestive function. Generally, it can be improved after high-frequency electrocoagulation and resection. Due to the narrow lumen of the duodenum, if the patient does not pay enough attention to it and does not treat it in time, the duodenal adenoma will be easily malignant. Duodenal adenomas and their tendency to turn into malignant tumors, i.e. carcinomas. Patients with malignant tumors usually have symptoms such as abdominal pain and abdominal mass. Cancerous duodenal adenomas require surgical resection of the cancerous area, and after examination of the cancerous area, a decision is made whether or not to combine the treatment with targeted drugs to improve symptoms. Patients with duodenal adenomas should go to the hospital for timely treatment and regular checkups to prevent the condition from worsening and follow the doctor’s instructions.