<prompt> A 55-year-old woman is admitted to the emergency department with ear pain, ringing in her ear tinnitus, dizziness, and vertigo. Radiographic examination reveals indications of Menieres disease. Which of the following structures is most likely affected by the edema that is associated with Menieres disease?Middle earEndolymphatic sacSemicircular canalsCochlea  <response>: Hydrops edema results from accumulation of excessive fluid in the endolymphatic sac. Labyrinthine hydrops or endolymphatic hydrops is known as Meniere disease. This disease can result in hearing loss, roaring noises in the ear, and episodic dizziness vertigo associated with nausea and vomiting. About 10 of patients require surgical intervention for persistent, incapacitating vertigo; others are treated with diuretics, low salt intake, and reduction of stimulants like caffeine to lower the volume of body fluids and alleviate the symptoms of Meniere disease. 