typically it occurs in patients who have sustained a profound hearing loss in one ear , usually from infection or trauma , and then after a prolonged period of time develop either episodic vertigo from the same ear ( ipsilateral delayed endolymphatic hydrops ) or fluctuating hearing loss , also sometimes with episodic vertigo , in the opposite ear ( contralateral delayed endolymphatic hydrops ) .
C0011053
hearing loss
C0013443
ear