Differentiation between this and SCC would be based on a history of recent trauma or dental treatment in the area. Immunohistochemistry may aid the diagnosis. If the lesion is<unk> , there will be focal to absent immunoreactivity for p53, low immunoreactivity for MIB1 (Ki-67), and the presence of 4A4/p63- and calponin-positive myoepithelial cells.
Necrotizing sialometaplasia
Ectopic salivary gland tissue
Tuberculous gumma
Proliferating epidermoid cyst
Ceruminous adenoma
Perforating granuloma annulare
Benign lymphoepithelial lesion
Proliferating trichilemmal cyst