Yellowish lesions of the oral cavity. Suggestion for a classification

Changes in colour have been classically used to catalogue and classify the mucosal and soft tissue pathology of the oral cavity. Thus, these lesions have been catalogued as white, red, white and red, blue and/or purple, brown, grey and/or black. 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. Isolated reports recovering yellowish lesions within the oral cavity have been published from time to time. 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.

From a semiological point of view, these disorders can emerge as diffuse macular lesions (hypercarotenemia and hyperbilirubinemia), papular lesions (Fordyce condition, accessory 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).