Primary torsion of the omentum.
D000006:Abdomen, Acute / Q000209:etiology*; D000293:Adolescent; D000328:Adult; D001064:Appendicitis / Q000175:diagnosis; D002648:Child; D002764:Cholecystitis / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009852:Omentum / Q000473:pathology; D010532:Peritoneal Diseases / Q000150:complications / Q000175:diagnosis; D014102:Torsion Abnormality