ultrasound was more reliable in patients with clinically suspected disease , but a site by site analysis demonstrated it is insensitive for detecting prevertebral adenopathy less than 3 cm in size , thin , 1.5 cm omental plaques , 5 cm or smaller lesions involving the mesentery or bowel and peritoneal masses 2 cm or less in size .
C0028977
omental
C0025474
mesentery