Harold Hirschsprung was a Danish physician who is widely known for his work on the nervous system and especially the enteric nervous system. The enteric nervous system controls the digestive system and Hirschsprung identified a condition in which the nerve cells in the colon are missing. This condition is now known as Hirschsprung's disease. As for synonyms, Hirschsprung can be referred to as a medical expert, a neurologist, a researcher, a scientist, or a physician. He was a pioneer in his field and his contributions continue to benefit modern medicine. His life and work serve as an inspiration to medical professionals around the world.