Post-traumatic hydrops.

Post-traumatic Meniere's disease is a true clinical entity based on clinical observations and histopathologic study. The traumatic insult may be a blow to the head, a temporal bone fracture, infectious sequelae of measles, mumps, syphilis, or even acoustic trauma. Although there are many cases of Meniere's disease for which no definite etiologic agent can be identified, a detailed clinical history is the only way to identify possible etiologic causes for Meniere's disease. In all forms of post-traumatic Meniere's disease, the symptoms manifest in a delayed fashion following the insult, usually years.