6 year old boy with autism who received HBOT at 1.5 atm. Before HBOT, physical exam reveals distended abdomen (a) with chronic diarrhea. After HBOT, patient has improvements in distended abdomen (b) and bowel movements. Figure use with parental permission. Credit: Permission for use of figure from Hyperbaric Oxygen for Neurological Disorders granted by Best Publishing Company, Palm Beach Gardens, FL.