Abnormal oral mucosa morphology Focal epithelial hyperplasia of oral mucosa 2019-03-13T17:30:10Z Focal epithelial hyperplasia of the lining of mouth The occurrence of multiple or unique whitish or normal in color small papules or nodules in oral cavity, especially on labial and buccal mucosa, lower lip and tongue, and less often on the upper lip, gingiva and palate. Oral mucosa epithelial hyperplasia