eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2015-03-15 8 March Spl Edition 51 54 2192 article Nader Saki 1 Hassan Ashirini 1 Nasrin Sharafi 2 Associated professor of otolaryngology, Head and neck surgery, Hearing Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. Resident of otolaryngology, Head and neck surgery, Hearing Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. Malignant or necrotizing external otitis is a severe rare disease that is the progressive infection of the outer ear in older patients, diabetics or people who have impaired immune systems and expand to the base of the skull and causes to conflict. We aimed to analysis the prevalence of malignant external otitis in patients who admitted in ENT ward of Imam Khomeini hospital of Ahwaz, Iran in a 9-year period. This is a retrospective descriptive study of epidemiologic the Otolaryngology department of Ahwaz Imam Khomeini Hospital from March 2002 to March 2010. Data on the incidence of external otitis is based on age, sex, underlying disease, disease symptoms and the most common symptoms of this disease. The results were analyzed using SPSS software. Research about admission period of this patient shown 70% of patients in 10-15 days, 15% in 15-20 days, 10% in 5-10 days and 5% in 25-30 days period hospitalized in ENT ward. In this research we found 100% of cases have diabetes mellitus as underlying disease. In our study most common presentation was persistence otalgia and otorrhea. This study shows that high-risk group for malignant external otitis are elderly ages (60-70) and diabetic patients early diagnosis and treatment very important role in prevention of dangerous complication and decreasing admission period of this patients. https://biomedpharmajournal.org/vol8marchspledition/frequency-of-malignant-external-otitis-in-patients-admitted-to-the-otolaryngology-ward-of-imam-khomeini-hospital-ahwaz-iran-2002-2010/ Malignant External Otits Diabetes  Intra Cranial Complication