The spheroid sign: a new sign for accurate differentiation of intramural from extramural masses.


Barium-column defects with estimated centers lying within or outside the projected luminal contour of the bowel are likely to be intramural or extramural masses, respectively. Those with centers lying along the luminal contour are likely to be intramural. Wehn a mass is viewed partially face-on, 2 defects in the barium column appear. If either of these… (More)