| progonoma | <oncology, tumour> A tumour caused by tissue developing in the wrong place in the body. (09 Oct 1997) |
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| progonoma of jaw | A benign neoplasm of neuroectodermal origin that most often involves the anterior maxilla of infants in the first year of life. It presents clinically as a rapidly growing blue-black lesion producing a destructive radiolucency; histologically, it is characterised by small round undifferentiated tumour cells interspersed with larger polyhedral melanin-producing cells arranged in an alveolar configuration. Synonym: melanoameloblastoma, pigmented ameloblastoma, pigmented epulis, progonoma of jaw, retinal anlage tumour. (05 Mar 2000) |
| melanotic progonoma | A pigmented hairy nevus. (05 Mar 2000) |
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| progonoma |
a tumor due to misplacement of tissue as the result of fetal atavism to a stage which does not occur in the life history of the species, but which does occur in ancestral forms of the species.
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