**12. Hydrops and diagnosis**

Given the prevalence of EH in patients of MD, diagnostic tests developed to visualize the EH in vivo have been studied such as gadolinium‐based contrast media using heavily T(2)‐weighted 3D FLAIR [42]. The advent of such dynamic imaging technologies provides new insights into the pathophysiology of MD such as differential involvement of cochlear and vestibular com‐ partments and the fact that EH occurs in the asymptomatic or unaffected ear with a high (75%) frequency [38]. Studies also confirm the diagnostic value of such techniques to image the hydrops as essential in the workup of other conditions such as vestibular migraine versus MD [43].
