Natural history of Md Spontaneous remission of vertigo has been reported in up to 71% of cases with 8 years. a Spontaneous remission makes assessment of efficacy of therapy quite difficult Up to 50% of patients will eventually develop symptoms from the opposite ear 50% of patients occurred within a period of 2 year
Natural history of Md Lermoyez s syndrome: is characterized by hearing improvement that accompanies an acute attack of vertigo. The hearing remains good for a period of days or weeks only to gradually diminish before onset of the next attack Drop-attacks associated with MD(Tumarkin): in addition to the typical symptoms, patients experience abrupt and brief attacks such that they find themselves thrown to the ground with no warning and with little or no vertigo after the initial fall