a congenital benign nodular tumor of the alveolar ridge, of unknown histogenesis; histologically, it is composed of large cells with a granular cytoplasm similar to that of a granular cell tumor (myoblastoma).
con·gen·i·tal ep·u·lis of new·born
(kŏn-jeni-tăl ep-yūlis nūbōrn) Benign nodular tumor of the alveolar ridge, of unknown histogenesis.