Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Jones syndrome ?
    ### Response:
    Jones syndrome is a very rare condition characterized by gingival fibromatosis (enlargement and overgrowth of the gums) and progressive, sensorineural hearing loss. The onset of gingival fibromatosis usually occurs with the eruption of the permanent teeth. Excessive growth of the gums may cause displacement of teeth, over-retention of primary teeth, and increased spacing.
    