|Patients with cystic fibrosis have larger than usual normal appendix, with sizes ranging 4 from to 14.5 mm (average 8.3 mm).|
Lardenoye SW, Puylaert JB, Smit MJ et-al. Appendix in children with cystic fibrosis: US features. Radiology. 2004;232 (1): 187-9.