Ali Husnain Sheikh, Atiq U Rehman, Nasir Riaz, Naveed Aslam, Sana Kundi, Irshad Malik.
Frequency of Malignant Otitis Externa using CT-scan in uncontrolled Diabetic and positive aural culture for pseudomonas.
Pak J Med Health Sci Jan ;12(4):1638-41.

Background: Diagnosis of malignantotitis externa has always been a challenge for an otorhinolaryngologist. Various imaging studies can detect the disease, but these are expensive and are not routinely used. Out of these, the role of CT scan which is cheaper and easily available, has been studied and found successful by many authors. However, the results need validation. In this study, we describe our experience of analyzing CT scan findings to establish the radiological diagnosis of malignant otits externa. Aim: To determine the frequency of malignant otits externa using CT scan in uncontrolled diabetics with positive aural culture for pseudomonas aerogenosa. Study design : Cross sectional survey. Setting : ENT department of Akhtar Saeed Trust teaching Hospital. Duration with dates : Six months, starting from 30-05-2017 to 30-11-2017. Methods : Fifty patients with uncontrolled diabetes mellitus and positive pseudomonas culture were enrolled. CT scans were done in all patients. CT findings suggestive of malignantotitis externa that included bony erosion, soft tissues, intracranial and extracranial involvement were noted. Diagnosis of malignant otitis externa was established based on CT findings. Data was collected on a specially designed Proforma. Results : A total of 50 patients had CT scan. Diagnosis of malignant otits externa was established in 36 (72%) patients based on CT scan findings. Bony erosion was noticed in all (100%) the patients in whom diagnosis of malignantotitis externa was established. Conclusion : CT scan can be used for establishing diagnosis of malignantotitis externa. It is also an excellent modality in detecting bony erosions associated with malignant otitis externa.

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