CollinsDC. The length and position of the vermiform appendix: a study of 4,680 specimens. Ann Surg1932; 96: 1044–48.
2.
RettenbacherTHollerwegerAMacheinerP. Outer diameter of the vermiform appendix as a sign of acute appendicitis: Evaluation at US. Radiology2001; 218: 757–62.
3.
ParkNHParkCSLeeEJ. Ultrasonographic findings identifying the faecal-impacted appendix: differential findings with acute appendicitis. BJR2007; 80: 872–77.
4.
LimHKLeeWJLeeSJ. Focal appendicitis confined to the tip: diagnosis at US. Radiology1996; 200: 799–801.
5.
RodgersPMVermaR. Transabdominal ultrasound for bowel evaluation. Radiol Clin North Am2013; 51: 133–48.