Figure 5. Acute appendicitis in a 25-year-old woman who was 16 weeks pregnant and had RLQ pain and leukocytosis. Axial T2-weighted single-shot fast SE image of the right midabdomen shows the appendix (black arrowhead), which is curved medially, arising from the base of the cecum (C). Note the high signal intensity within the appendiceal lumen and that the appendix is dilated. A rounded area of low signal intensity (arrow) in the proximal appendix is noted; this area represents an appendicolith. Periappendiceal fat stranding is seen as a bandlike area of high signal intensity (white arrowheads) in the adjacent fat. The MR imaging findings were consistent with acute appendicitis, which was confirmed at surgery and pathologic analysis.