Figure 2

Transverse gadolinium-enhanced 3D time-of-flight magnetic resonance angiography images at subsequent intervals showing the carotid body tumor on the left in 2006 (A), unchanged in 2008 (B), inhomogeneous ring-like enhancement in 2010 (C), and further regression in 2011 (D). On the image only a subtle linear enhancement is noted, no evidence of an enhancing mass could be detected.