Solitary Colonic Ganglioneuroma with Central Depression: A Rare Case with Unique Morphology

1Department of Gastroenterology, Hiroshima University Hospital, Hiroshima, Japan 2Gastrointestinal Endoscopy and Medicine, Hiroshima University Hospital, Hiroshima, Japan aCorrespondence: Toshio Kuwai, MD, PhD, FASGE, Gastrointestinal Endoscopy and Medicine, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551 Japan, Telephone: +81-82-257-5193, Fax: +81-82-257-5194. Email: [email protected]