From a semiological point of view, these disorders can emerge as diffuse macular lesions (hypercarotenemia and hyperbilirubinemia), papular lesions (Fordyce condition, ac- cessory lymphoid aggregates, verruciform xanthoma, lipoid proteinosis and amyloidosis), hypertrophies (yellow hairy tongue), pustular lesions (pyostomatitis vegetans) cysts (dermoid and lymphoepithelial cysts) and nodes (lipoma and liposarcoma) (1, 11). The yellow set of lesions has a wide prognostic spectrum and represents a very heterogeneous group of lesions, acting some of them as occasional markers for systemic disorders (5-10). Isolated reports recovering yellowish lesions within the oral cavity have been published from time to time. However, and to the best of our knowledge, yellow lesions and conditions of the oral cavity have not been organized and recognized as a separate group (1-4). Thus, these lesions have been catalogued as white, red, white and red, blue and/or purple, brown, grey and/or black. in colour have been classically used to catalogue and classify the mucosal and soft tissue pathology of the oral cavity.
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