Patient Question: Disease: Rectal mesenchymal tumor Help wanted: If you need surgery, we would like to see you for surgery! Hospital Department: Shanghai Cancer Hospital, Department of Colorectal Oncology Content: Examination and laboratory tests: Hello, sir. The patient was diagnosed with rectal mesenchymal tumor at the end of October 10, and it is only 4cm away from the anus. He started to take Gleevec at the beginning of 2011 and has been taking it for more than a year. Now he has stopped taking it. The MRI results are: no significant thickening. Do I still need surgery in this case? The patient’s mesenchymal tumor is growing in the anterior rectal wall, near the urethra. So should I operate or should I follow the prevention? Is it possible that recurrence may occur in case of poor health? Will the surgery affect the urethra if it recurs? Is it possible to preserve the anus? Treatment (current medication or recent surgery): I have been taking Gleevec for over a year. The current test results are:No significant thickening History: Rectal mesenchymal tumor was diagnosed on October 27, 2010.