Question

Why is the identification of the appendix on cross-sectional slices sometimes difficult?

Answer 1

Appendix, or vermix, is a routinely evaluated structure during emergency imaging. Etymology derives from the Latin “ vermiform ” which translates to “ worm-shaped, ” its common morphological appearance. Its endocrine cells produce amines and hormones to assist with various biological control mech- anisms, whereas the lymphoid tissue is involved with maturation of B lymphocytes and production of IgA antibodies

1]. The appendix secretes 2 – 3 ml of mucus daily

2]. Emergency radiologists need to identify and evaluate the appendix. In suspected acute appendicitis, computed tomography (CT) is the modality of choice with greater than 90 – 95 % sensitivity and specificity. Ultrasound (US) is preferred for children and during pregnancy. Noncontrast magnetic resonance imaging (MRI) can be a second-line test during pregnancy

3]. Familiarity with the anatomy and anatomical variants is helpful in identifying the appendix. Knowledge of the variety of pathologies afflicting the appendix and their imaging characteristics is useful for accurate diagnosis and appropriate guidance regarding clinical and surgical management.