What is "gummy tumor"

Gummy \Gum"my\, a. [Compar. Gummer (?); superl. Gummirst.] Consisting of gum; viscous; adhesive; producing or containing gum; covered with gum or a substance resembling gum.

Kindles the gummy bark of fir or pine.
--Milton.

Then rubs his gummy eyes.
--Dryden.

Gummy tumor (Med.), a gumma.