A and B, Two consecutive axial CT scans in a patient with a right-sided glomus vagale show atrophy of the right PCA muscle and right cricothyroid muscle relative to the normal left side (arrowhead indicates normal left PCA muscle; arrow, normal left cricoth... A and B, Two consecutive axial CT scans in a patient with a right-sided glomus vagale show atrophy of the right PCA muscle and right cricothyroid muscle relative to the normal left side (arrowhead indicates normal left PCA muscle; arrow, normal left cricothyroid muscle) Laura Vitale Romo, and Hugh D. Curtin AJNR Am J Neuroradiol 1999;20:467-471 ©1999 by American Society of Neuroradiology