title: Periodic syndrome.
mesh_terms: D000006:Abdomen, Acute / Q000209:etiology; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D003109:Colonic Diseases, Functional / Q000209:etiology; D004827:Epilepsy / Q000150:complications; D006801:Humans; D011602:Psychophysiologic Disorders / Q000175:diagnosis; D013035:Spasm / Q000209:etiology; D013315:Stress, Psychological