 Dense fluid layering in the pelvis can also result, related to either pus or enteric spillage.When patients are thin or younger, the relative absence of fat can make the appendix and surrounding fat stranding difficult to see.Magnetic resonance imaging (MRI) use has become increasingly common for diagnosis of appendicitis in children and pregnant patients due to the radiation dosage that, while of nearly negligible risk in healthy adults, can be harmful to children or the developing baby.