My dad had surgery to remove a large polyp from his colon last month. In June 2003 he had a colonoscopy procedure in which the large polyp was found but could not be completely removed through the rectum. There was no follow up call or appointment and he simply forgot about it because there was no follow up. He decided to have another colonoscopy done and the polyp had grown larger. 5 years later the large poylp was removed and its cancerous. The VA Hospital performed the procedure in 2003 and I want to know if I should pursue this negligence and how?