Molecular genetic pathology is the laboratory study of genetic samples of cells, tissues, body fluids, and organs, associated with heredity. A genetic pathologist identifies the causes, processes, and risks of inherited diseases through microscopic study. Laboratory test results of genetic material help to diagnose, confirm, and monitor inherited diseases. The genetic pathologist can provide counseling to patients and their families, with information about their condition and the risk of a genetic disorder in the family.

Laboratory study of tissue and fluid samples can help to 1) diagnose inherited genetic abnormalities and tumor malignancies, 2) monitor genetic changes of patients who have undergone bone marrow transplants, 3) diagnose and monitor viral, fungal, and bacterial infections.

Doctor density varies by specialty and location. Illinois has 5 practicing molecular genetic pathologists. Broken out by city, molecular genetic pathology doctor density in Chicago is 3, in Joliet is 1, and in Park Ridge 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.