Fig. 3. 123I-labeled metaiodobenzylguanidine scan. Anterior view (A ). Posterior view (B ). Note the three pathologic uptakes: lower abdominal mass between the aorta and the inferior vena cava, at the height of the right renal artery (1 ), the left femur (2 ), and the posterior aspect of the right third rib (3 ). Also note that the upper abdominal mass near the celiac trunk does not absorb.