The "tree-in-bud" pattern at thin-section computed tomography is characterized by small centrilobular nodules of soft-tissue attenuation connected to multiple branching linear structures of similar caliber originating from a single stalk. This pattern also resembles the small objects used in the childhood game of jacks.
Tree in bud
Pedunculated
Mees' lines
Half and half nails
Wonder 
Piped link
Clean margin
Sponge