A general surgeon manages surgical conditions affecting almost any area of the body. General surgeons often evaluate patients to determine whether surgery is needed or not. Patients with acute abdominal pain may be examined by a surgeon to determine if it is a surgical or non-surgical problem. Some common operations performed by general surgeons are cholecystectomy (gallbladder removal), appendectomy for appendicitis, operations to biopsy tissues for diagnostic purposes as in the breast, colon, liver, pancreas, and removal or repair of damaged or diseased tissues and organs. Some operations performed by general surgeons repair injured tissues without removing tissues. Colorectal Surgery: A Colon and rectal surgeon is an expert in the surgical treatment of colon and rectal disease diseases. In addition to finishing a general surgery residency, a colorectal surgeon has undergone an additional year of advanced training to specialize in treating benign disorders and malignant diseases of the colon and rectum and in performing colonoscopies. They treat benign disorders such as hemorrrhoids, fissures, abscesses, anal incontince constipation and inflammatory bowel diseases. They also utilize the latest technologies and a multidisciplinary approach to evaluate and treat malignant diseases such as colon cancer, rectal cancer, and anal cancer. General/Vascular Surgery: A surgeon with special qualifications in the management of surgical disorders of the blood vessels, excluding those of the heart, lungs, or brain. Examples of operation performed by general vascular surgeons include grafting of vessels that are occluded by blood clot and atherosclerosis that may occur in the carotid vessels, aorta, or leg vein arteries.