Ménière's disease
Background
Ménière's disease (MD) is a disease of the inner ear. The inner ear is composed of the organ of balance (semicircular canals) and the organ of hearing (the cochlea). In MD these organs are damaged causing a triad of symptoms which include vertigo (dizziness, illusion of movement), noises in the ear - tinnitus (see entry) and hearing loss (see entry, Deafness). The severity and frequency of symptoms varies between people and with time in the individual person. MD affects mainly white people and affects both sexes equally. It can occur at all ages, including childhood, but its onset is most frequent in the twenty to forty age group.