Patients typically present with swelling with or without pain. The slow-growing tumor predominantly arises in long bones in a subcortical location (95% in the tibia or fibula). Most commonly, patients are in their second or third decade, but<unk>  can occur over a wide age range. Benign osteofibrous dysplasia may be a precursor of<unk>  or a regressive phase of<unk> . Histologically, islands of epithelial cells are found in a fibrous stroma. The tumor is typically well-demarcated, osteolytic and eccentric, with cystic zones resembling soap bubbles.
Adamantinoma
Neural fibrolipoma
Hamartoma
Cylindroma
Esthesioneuroblastoma
Nesidioblastoma
Lipoblastoma
Syringoma