RID35654 tree-in-bud sign

synonym tree-in-bud opacities tree-in-bud opacity

definition Small, peripheral spots of soft-tissue attenuation branch from linear opacities on lung CT scans, resembling a budding tree. Indicates pathological dilation, thickening, and impaction of small airways.

comment http://radiology.rsna.org/cgi/content/full/222/3/771