[Chronic suppurative otitis media complicated diffuse serous labyrinthitis: 4 cases report].

We reported 4 cases with rare diffuse serous labyrinthitis who were from 1,112 patients with dangerous otitis media in recent 20 years. The diagnostic key points and operative opportunity were discussed. We think that it is very effective to do radical mastoidectomy as soon as possible, to use vasodilator neurotrophic drugs and glucocorticoid hormone.