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n. pl. gum·mas or gum·ma·ta (gŭm′ə-tə)
A small rubbery granuloma that has a necrotic center and is enclosed by an inflamed fibrous capsule. It is characteristic of an advanced stage of syphilis.

[New Latin, from Late Latin, gum; see gum1.]

gum′ma·tous adj.
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References in periodicals archive ?
We report a case of bejel in a young boy in Iran, manifested by gummatous ulcerating lesions of the face.
This is characterized by severe ulcerating lesions and gummatous infiltration of mouth, eye, subcutaneous tissue, bone, joints, and cerebrospinal system (1).
Gummatous syphilis can appear in two years, though a period of 10 to 15 years is more usual.