Magnetic resonance imaging and thermography were performed in a 67-year-old
man with idiopathic facial angioedema, Thermography suggested decreased he
at emission in the region of the angioedema. Magnetic resonance imaging rev
ealed diffuse high intensity in the subcutaneous interstitial tissue and di
lated veins on T2-weighted images. Marked contrast enhancement was noted in
the subcutaneous tissue on postcontrast T1-weighted images.