General surgery can be performed on almost any area of the body. A general surgeon is a physician who performs surgery and provides preoperative, operative, and postoperative care to surgical patients. This surgeon can treat diseases, injuries or deformities by surgery or minimally invasive techniques, such as endoscopy, where a tiny scope is used to view internal organs or structures. The endoscope can be used during operating procedures, or before surgery, to diagnose, assess and treat problem areas.

Physicians in this specialty treat patients suffering from numerous diseases and illnesses, but some of the most common are breast disease, thyroid disorders, hernia, breast cancer, Crohn's Disease, cystic fibrosis, Cirrhosis, Hepatitis, lymphoma, Chronic renal failure, Morbid obesity, Adhesions, Colorectal cancer, Hirschsprung's disease, Volvulus, Thyroid cancer, Kidney cancer, Metastatic disease, Toxic megacolon, and Meckel's diverticulum.

Once properly diagnosed, practitioners can perform numerous procedures on patients including microsurgery, mastectomy, laser surgery, Minimally Invasive Surgery, breast reconstruction, breast surgery, thyroid surgery, Laparoscopic Surgery, da Vinci Surgical System, Bypass Surgery, robotic surgery, Resection, Liver transplant, Whipple procedure, Kidney transplant, Bariatric surgery, Appendectomy, Cholecystectomy, cryosurgery, and abdominal surgery.

To diagnose patients with possible illnesses and diseases, specialists will often perform one of many tests including endoscopy, Magnetic Resonance Imaging (MRI), x-ray, Computed Axial Tomography (CT or CAT Scan), Electrocardiogram (ECG or EKG), biopsy, Cardiac Stress Test, Lower GI (Barium Enema), Upper GI (Barium Swallow), and fecal occult bloodtest.

Doctor density varies by specialty and location. Illinois has 1,226 practicing general surgeons. Broken out by city, general surgery doctor density in Macomb is 2, in Mahomet is 1, in Manito is 1, in Manteno is 2, in Marion is 11, in Maryville is 9, in Mattoon is 6, in Maywood is 76, in Mc Leansboro is 1, in Mchenry is 3, in Melrose Park is 9, in Mendota is 1, in Metamora is 2, in Metropolis is 1, in Mokena is 1, in Moline is 12, in Monmouth is 2, in Monticello is 1, in Morris is 10, in Morton is 4, in Mount Carmel is 2, in Mount Prospect is 1, in Mount Vernon is 6, and in Murphysboro is 1.

Most people think that Chicago, because of its size and popularity, is Illinois’ capital city, but that distinction belongs to Springfield, home of the Abraham Lincoln Museum. Illinois has hundreds of museums, numerous yearly art and ethnic festivals, a lakeshore bordering Lake Michigan, and the many national forests and parks that offers visitors camping, horseback riding, biking, kayaking, and fishing. Chicago is home to the Sears Tower, the Shedd Aquarium, the Art Institute of Chicago, the Adler Planetarium, the Museum of Science and Industry, and other cultural opportunities and restaurants in the Navy Pier area.

According to 2005 Census estimates, Illinois has a population of 12,763,371. Of this population, 3,172,677 are under the age of 18 and 1,523,937 are at or above the age of 65.