Congenital absence of the vermiform appendix.
D000328:Adult; D001064:Appendicitis / Q000175:diagnosis; D001065:Appendix / Q000002:abnormalities* / Q000601:surgery; D001202:Ascitic Fluid / Q000382:microbiology; D005260:Female; D006801:Humans; D007443:Intussusception / Q000175:diagnosis; D013210:Staphylococcus / Q000302:isolation & purification