<unk> s can occur in any obstructed air cells. They often arise from the apex of the petrous bone and may enlarge enough to expand in the posterior cranial fossa and produce nerve disturbances.
Cholesterol granuloma
Rhinoscleroma
Perforating granuloma annulare
Pyogenic granuloma
Ganglion cyst
Eosinophilic folliculitis
Congenital epulis
Villous adenoma