Complex sentence: Ménière's disease is associated with endolymphatic hydrops (EH), a distension of the endolymphatic spaces in the inner ear due to an excessive build-up of the fluid endolymph.
Split into simpler sentences: Ménière's disease is associated with endolymphatic hydrops (EH), an excess of fluid in the inner ear. EH is a distension of the endolymphatic spaces in the inner ear due to an excessive build-up of the fluid endolymph.