ETIOLOGY, DIAGNOSIS AND TREATMENT OF DELAYED ENDOLYMPHATıC HYDROPS: A REVIEW
1Keçiören Eğitim ve Araştırma Hastanesi, Kulak Burun Boğaz, Ankara, Türkiye2Dışkapı Yıldırım Beyazıt Eğitim ve Araştırma Hastanesi, Kulak Burun Boğaz, Ankara, Türkiye Introduction: Delayed endolymphatic hydrops (DEH) is a clinical entity that is observed in patients with previously established unilateral profound hearing loss after a latency period and it differs from Meniere's disease with these features. The latency period can range from 1 to 74 years.Three types of DEH defined: ipsilateral, contralateral and bilateral types. When medical theraphy fails, surgical treatment is indicated.
Patients and Methods: The literature is searched for clinical trials and review articles about DEH and they evaluated systematically. Epidemiologic and etiologic data, clinical features, audiovestibular findings and treatment methods of published 308 cases of DEH are grouped in packages and analysed.
Results: One hundred and fifty seven of 308 DEH cases were ipsilateral, 133 were contralateral and 18 were bilateral cases. The most common causes were unknown events during childhood, bacterial infections, sudden hearing loss, mumps and head trauma. In 92 cases, in which vestibular findings were published, %69 ENG abnormalities and %76 anormal caloric test were existed. Low salty diet and diuretics found to be effective in medical therapy. Labyrinthectomy is the most performed and effective method in the ipsilateral DEH cases, still endolymphatic sac surgery is the only and most effective method in the contralateral DEH cases.
Keywords : Delayed endolymphatic hydrops, vertigo, hearing loss