title: Cyclical vomiting with pneumomediastinum.
mesh_terms: D000293:Adolescent; D004830:Epilepsy, Tonic-Clonic / Q000209:etiology*; D006801:Humans; D008297:Male; D008478:Mediastinal Emphysema / Q000209:etiology*; D010507:Periodicity; D014839:Vomiting / Q000150:complications*